I just downloaded QuickBooks 2010 EasyStart, and cannot open my 2006 QuickBooks Pro file even after all updates have been done to it. 2010 is telling me "this version cannot open older files" - how can I convert the 2006?

We would need to know the actual error message it is giving. Sometimes you are dealing with damaged installs, and running Reboot.bat from the program folder will fix it.

cant u download the content of the floppy to ur laptop?

1. From the QuickBooks Help menu, choose Update QuickBooks.
2. Click the Overview tab and click Update Now.
3. Select the desired downloads in the Update Now window.
4. Click Get Updates to download your selected updates.
5. When the Update Complete message appears, click Close.
6. From the File menu, choose Exit.
7. Start QuickBooks and click Yes to the message to install the update.

Note: If you experience problems with the automatic update, a manual download is available.

for more help visit QuickBooks Technical Support

Correct, the full version will run for 5-30 days without registration ( depending on the version). After that you must purchase the software.

Here, let me google that for you: https://community.intuit.com/articles/1265964-point-of-sale-error-an-internal-quickbooks-error-occurred-when-adding-customers-to-qb

This should help.. restart and then follow this..

To resolve this error, try restarting the computer that hosts the company file:

1. Click the Microsoft Windows Start button and select Shut Down. The Shut Down window opens.
2. Click the drop-down arrow and select Restart, and then click OK.
3. Open Quickbooks and try to open the company file.

If the error continues, ensure that any firewall and/or antivirus software is configured to allow access to the QuickBooks company file and folder.

I would not open up the company file in 2009. Open your 2003 Quickbooks, make a backup and then restore the back up in 2009. If you do run into problems you might want to upgrade into 2006 and then to 2009. (you will need to find someone who can do this for you if you don't have a 2006 version. I can help you with that if you need it