Go to the link below and scroll down to line 12 (left column) and click on "EXE (lnk and regfile) Fix for Windows XP" to download a reg file fix. Save the REG File to your hard disk. Double click it or right click it and choose "merge" and answer yes to the import prompt.
If you can't run the file do the following:
Press CTRL-ALT-DEL and open Task Manager. Once there, click File, then hold down the CTRL key and click New Task (Run). This will open a Command Prompt window. Enter REGEDIT.exe and press Enter. Once regedit is open click File>Import and locate that reg file fix, hilite it and click Open.
Note: If you can't access the Internet with the problem computer use another computer to download the reg file fix onto a CD, thumb drive, or floppy and transfer the file to the problem computer.
After that .reg file is merged into the registry successfully restart your computer's hard drive.