Ardilla,
If you have the Windows XP installation disc, you can do the following:
Restore the "Windows Classic" theme via "Display Properties\Themes tab\Theme list\Apply button" > uninstall Visual Style > reboot computer > click 'Start' > click 'Run' > type: sfc /scannow > press 'Enter' > wait for the System File Checker to complete the scan (insert the Windows XP installation disc if requested) > immediately after completing the sfc scan, go to Window Update and have it scan your computer > install any critical files offered > reboot computer > go to "C:\WINDOWS\Resources\Themes" folder and remove all files 'except' the following: "Luna" folder, "Luna" windows theme file, and "Windows Classic" windows theme file.
Once this is completed, look in "C:\Program Files" folder for any "TGT Soft" folder and if found, delete it.
Go to Display Properties\Themes tab\Theme list, and select "Windows XP" and then click the "Apply" button. If all is well, the theme will be applied. If so, go to the "Display Properties\Appearance tab" and verify that the only options are the "Windows XP Style" and the "Windows Classic Style" under the 'Windows and Buttons' drop-down list.
If all of the above works fine, then you are set to install WindowBlinds without further need for concern.
Note - you may be prompted to install the Windows XP installation disc when attempting to apply the "Windows XP" theme via the Display Properties\Themes tab\Theme list. If so, just place the disc in the CD drive and follow the prompts to repair the proper files. This is okay and Windows will fix any issues.
Note #2 - as you can see, you will need the Windows XP installation disc to insure the proper repairing of files if requested by the system during the procedures.
If for some reason the themes functionality goes sideways, you can go here http://www.kellys-korner-xp.com/xp_tweaks.htm and go to line item #187 > click on and download the "Restore Themes Functionality" file > double-click the downloaded ".reg" file and say yes to running it. This will repair any registry issues that may have been created by installing/uninstalling the Visual Styles program.
That should do it.