I think Jo*Mar's suggestion of using the System Restore might solve your problem. If you have never used it before, you will wonder how you ever lived without it.

I think you are using Windows XP. If so, here are the steps:

1. Click Start
2. Choose Help and Support (on right)
3. Choose "Undo changes to your computer with System Restore"
4. Select "Restore my computer to an earlier time", Click Next
5. You should now see a window with 2 boxes: a calendar on the left and a box on the right with today's date. The dates in bold on the calendar have Restore Points. Generally your computer will automatically set a restore point every day. (It will also set a Restore Point before some software installations.)
6. Think back to the first time the message popped up, and click on a date a couple of days before (make sure it is bold).
7. In the box on the right you should now see a "System Checkpoint" highlighted.
8. Click Next. Your computer will start the Restore process. This will take a long time, and it will reboot. After the reboot, don't be alarmed if it takes longer to start-up than normal. This is part of the Restore process.

Hopefully that will take your computer back to a date the driver was still properly installed.

Hint: Before installing new software, I always set a Restore Point. That way, if there is a problem with the software, I can restore the computer to the point before the new software installed. You would do this at Step 3, by choosing "Create a Restore Point"