Click on Start, Run, and type regedit and press Enter Click on the plus signs (+) next to the following folders
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Control
Class
{4D36E965-E325-11CE-BFC1-08002BE10318}
This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand column.
Upper Filters
Lower Filters
Upper Filters.bak
Lower Filters.bak
If any of the above keys shown in step 4 are listed, right-click on them and choose DeleteAfter deleting the keys, close the registry editorReboot your computerOpen My Computer and check to see if your CD or DVD drives have returned. You may also want to open Device Manager and verify that the yellow exclamation and error code on the CD or DVD drive is gone.
hope this helps
if this fails to fix the problemIt could be a problem with the lens you could use a liquid type lens cleaner place 2-3 drops on top of a cd/dvd then run it
Click on Start, Run, and type regedit and press Enter Click on the plus signs (+) next to the following folders
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Control
Class
{4D36E965-E325-11CE-BFC1-08002BE10318}
This folder is the DVD/CD-ROM Drive Class Description in the registry. Look for any of the following names in the right hand column.
Upper Filters
Lower Filters
Upper Filters.bak
Lower Filters.bak
If any of the above keys shown in step 4 are listed, right-click on them and choose DeleteAfter deleting the keys, close the registry editorReboot your computerOpen My Computer and check to see if your CD or DVD drives have returned. You may also want to open Device Manager and verify that the yellow exclamation and error code on the CD or DVD drive is gone.
hope this helps
There are many things that might cause your PC to run slowly. It could be a fragmented disk; fragmented registry; a virus, Trojan, or spy ware; high CPU and/or utilization due to too many programs running; high disk I/O; or something else. To check your CPU and memory utilization, run Task Manager. You can start Task Manager by pressing CTRL+ALT+DEL and then clicking on the Task Manager Button. In Task manager, click on the Performance tab and check CPU Usage and PF Usage. PF Usage is an indicator of memory usage. If one or both of these is high, click on the Processes tab, and sort the columns by CPU or Memory to see what processes are consuming the resource. If you are not sure what the process "Image name" is for, Google the name and you should find what the process is for. If your CPU and memory usage are reasonable, then you may have a different issue. Even if you running anti-virus software, it may be beneficial to scan your PC with another scanner to check for viruses. No anti-virus software is 100% perfect at catching everything. Here are a few good free online virus scanners that you can run to check your PC: http://security.symantec.com/sscv6/home.asp?langid=ie&venid=sym&plfid= 23&pkj=RRJEDTKJBTVISBYWWYP http://onecare.live.com/site/en-us/default.htm http://www.eset.com/us/online-scanner http://www.pandasecurity.com/homeusers/solutions/activescan/ An excellent free utility for overall system maintenance is Advanced System Care Free ( http://download.cnet.com/advanced-systemcare-free/3000-2086_4-10407614 .html ). I use this utility on a regular basis. You should always run anti-virus software. There are several very good, free, anti-virus products available. One good source to read editor and user reviews, and safely download anti-virus software, is http://download.cnet.com -- search for free antivirus software. In addition to the reviews, you can see how many people are downloading the software, which is another good indicator of how popular it is. I have used AVG Free ( http://download.cnet.com/avg-anti-virus-free/3000-2239_4-10320142.html ) , and Avast Free ( http://download.cnet.com/avast-free-antivirus/3000-2239_4-10019223.htm l ). Both are very good, and completely free. At present I am using Avast on all of my home computers. I have heard good things about Avira AntiVir Free ( http://download.cnet.com/Avira-AntiVir-Personal-Free-Antivirus/3000-22 39_4-10322935.html ), and it has good ratings, but I have not personally tried it. In addition to Avast or one of the other free anti-virus software packages, I also run Ad-Aware ( http://download.cnet.com/ad-aware-free-internet/3000-8022_4-10045910.h tml ). Ad-Aware is a free anti-malware, anti-spyware package. Good luck!
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