I had to restore my pc and now my symantec antivirus will not enable

If the ransomware prevents you from entering Windows or running programs, as lock-screen viruses typically do, you can try to use System Restore to roll Windows back in time. Doing so doesn't affect your personal files, but it does return system files and programs to the state they were in at a certain time. The System Restore feature must be enabled beforehand; Windows enables it by default. http://guides.uufix.com/understand-ransomware-a-type-of-big-threat-to-global-computer-users-infographics

There are couple of ways to enable Symantec auto protect.
Step 1: Right Click on the little shield like Icon on system tray (Right next to date and time). Left click once on enable Auto Protect.
Step 2: Click on Start and then all Programs. Look for Symantec Client Security and then Symantec antivirus. Click on the Configure Tab and click on file system auto protect. Check the Option Enable Auto Protect and then Click on OK.

You might like to try a WEB based virus scan before you try a complete restore. :-

Trend Micro HouseCall
Many computer users rely on Trend Micro for their antivirus needs but when you’ve got a virus, sometimes your installed version won’t boot up, so the company’s got a free online scan that can be used by anyone in this situation, not just Trend Micro users. It’s called HouseCall and it’s a free virus scan that you can get right now... just go to http://housecall.trendmicro.com. When you get there, click on Launch HouseCall 6.5 (you have to have Java or ActiveX controls enabled)

Norton Security Scan
Norton Security Scan is the online free security scan offering from Symantec, makers of the popular Norton Antivirus and Norton Internet Security products. If you want to start using this one, first make sure you’re running Internet Explorer 5.0 or above, and then head over to http://security.symantec.com and click Continue to Symantec Security Check:

do restore and download avg

1. run the liveupdate
2.click on start and inside the start search type msconfig check whether it is in selctive or normal startup (it should be normal startup) change the date to one month before and run the liveupdate again and restart the computer

You need a newer version that will work with Vista

The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.

1. Disable System Restore (Windows Me/XP).
2. Update the virus definitions.
3. Run a full system scan.
4. Delete any values added to the registry.

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:

• How to disable or enable Windows Me System Restore
• How to turn off or turn on Windows XP System Restore

Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).

2. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:

• Running LiveUpdate, which is the easiest way to obtain virus definitions.
  
  If you use Norton AntiVirus 2006, Symantec AntiVirus Corporate Edition 10.0, or newer products, LiveUpdate definitions are updated daily. These products include newer technology.
  
  If you use Norton AntiVirus 2005, Symantec AntiVirus Corporate Edition 9.0, or earlier products, LiveUpdate definitions are updated weekly. The exception is major outbreaks, when definitions are updated more often.
  
  
  
• Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them.

The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.

3. To run a full system scan

1. Start your Symantec antivirus program and make sure that it is configured to scan all the files.
   
   For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files.
   
   For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files.
   
   
   
2. Run a full system scan.
3. If any files are detected, follow the instructions displayed by your antivirus program.
4. Delete the autorun.inf file from writeable removable devices, if necessary.
   

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode. Once you have restarted in Safe mode, run the scan again.


After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.

4. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.

1. Click Start > Run.
2. Type regedit
3. Click OK.
   
   Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.
   
   
4. Navigate to the following registry subkeys:
   
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
   HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
   HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Windows\"load"
   
   
5. In the right pane, delete any values associated with the worm.
   
   
   
6. Exit the Registry Editor.

Get rid of Norton AV. It not only is a resource hog but doesn't rate high as an AV solution. The Eastern European products such as Bit Defender and Kaspersky are rated much higher. There are two good free solutions such as Avast and Avira but they have to be updated manually instead of automatically

Hello hawk893

Are you logged into a Windows profile w/ Administrator privileges?

If not, change your user profile rights to Administrator (from another Administrator profile).

If the problem persists, enter Safe Mode and try enabling and disabling NAV (Norton Antivirus) from there.

If the problem still persists, you may have picked up a virus that disabled your AV software. You can go HERE if you like to perform an online AV scan. There are other sites as well that will do this for you. Just perform a search engine search on "Online AV Scan".

If you need assistance w/ any of these recommendations, just let me know. I'll be happy to provide detailed instructions for you.


Please, let us know if this response was helpful for you or, of course, if you have more questions, etc. on this topic.

Thank you
BJ

The following instructions pertain to all current and recent Symantec antivirus products, including the Symantec AntiVirus and Norton AntiVirus product lines.


Disable System Restore (Windows Me/XP).
Remove all the entries that the risk added to the hosts file.
Update the virus definitions.
Run a full system scan and delete all the files detected.
Delete any values added to the registry.

For specific details on each of these steps, read the following instructions.

1. To disable System Restore (Windows Me/XP)
If you are running Windows Me or Windows XP, we recommend that you temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file on your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
How to disable or enable Windows Me System Restore
How to turn off or turn on Windows XP System Restore

Note: When you are completely finished with the removal procedure and are satisfied that the threat has been removed, reenable System Restore by following the instructions in the aforementioned documents.

For additional information, and an alternative to disabling Windows Me System Restore, see the Microsoft Knowledge Base article: Antivirus Tools Cannot Clean Infected Files in the _Restore Folder (Article ID: Q263455).


2. To remove all the entries that the risk added to the hosts file

Navigate to the following location:


Windows 95/98/Me:
%Windir%
Windows NT/2000/XP:
%Windir%\System32\drivers\etc

Notes:
The location of the hosts file may vary and some computers may not have this file. There may also be multiple copies of this file in different locations. If the file is not located in these folders, search your disk drives for the hosts file, and then complete the following steps for each instance found.
%Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows (Windows 95/98/Me/XP) or C:\Winnt (Windows NT/2000).


Double-click the hosts file.
If necessary, deselect the "Always use this program to open this program" check box.
Scroll through the list of programs and double-click Notepad.
When the file opens, delete all the entries added by the risk. (See the Technical Details section for a complete list of entries.)
Close Notepad and save your changes when prompted.


3. To update the virus definitions
Symantec Security Response fully tests all the virus definitions for quality assurance before they are posted to our servers. There are two ways to obtain the most recent virus definitions:
Running LiveUpdate, which is the easiest way to obtain virus definitions: These virus definitions are posted to the LiveUpdate servers once each week (usually on Wednesdays), unless there is a major virus outbreak. To determine whether definitions for this threat are available by LiveUpdate, refer to Virus Definitions (LiveUpdate).
Downloading the definitions using the Intelligent Updater: The Intelligent Updater virus definitions are posted daily. You should download the definitions from the Symantec Security Response Web site and manually install them. To determine whether definitions for this threat are available by the Intelligent Updater, refer to Virus Definitions (Intelligent Updater).

The latest Intelligent Updater virus definitions can be obtained here: Intelligent Updater virus definitions. For detailed instructions read the document: How to update virus definition files using the Intelligent Updater.


4. To scan for and delete the infected files
Start your Symantec antivirus program and make sure that it is configured to scan all the files.
For Norton AntiVirus consumer products: Read the document: How to configure Norton AntiVirus to scan all files.
For Symantec AntiVirus Enterprise products: Read the document: How to verify that a Symantec Corporate antivirus product is set to scan all files.
Run a full system scan.
If any files are detected, click Delete.

Important: If you are unable to start your Symantec antivirus product or the product reports that it cannot delete a detected file, you may need to stop the risk from running in order to remove it. To do this, run the scan in Safe mode. For instructions, read the document, How to start the computer in Safe Mode. Once you have restarted in Safe mode, run the scan again.

After the files are deleted, restart the computer in Normal mode and proceed with the next section.

Warning messages may be displayed when the computer is restarted, since the threat may not be fully removed at this point. You can ignore these messages and click OK. These messages will not appear when the computer is restarted after the removal instructions have been fully completed. The messages displayed may be similar to the following:

Title: [FILE PATH]
Message body: Windows cannot find [FILE NAME]. Make sure you typed the name correctly, and then try again. To search for a file, click the Start button, and then click Search.


5. To delete the value from the registry
Important: Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified subkeys only. For instructions refer to the document: How to make a backup of the Windows registry.

Click Start > Run.
Type regedit
Click OK.

Note: If the registry editor fails to open the threat may have modified the registry to prevent access to the registry editor. Security Response has developed a tool to resolve this problem. Download and run this tool, and then continue with the removal.


Navigate to and delete the subkey:

HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\RpcRemotes


Navigate to the subkey:

HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Setup


In the right pane, delete the value:

"Ph4nt0m" = "Ph4nt0m"


Navigate to the subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv


In the right pane, reset the value to the original value if applicable:

"Start"


Navigate to the subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess


In the right pane, reset the value to the original value if applicable:

"Start"


Exit the Registry Editor.



also u can use the link for free download of virus removal tool
http://www.bitdefender.com/site/Download/browseFreeRemovalTool/