When you say you've tried everything in my last post as below:
You may wish to try a system install overlay or failing that, a clean install. It is possible to rid your system of the 3 programmes you're trying to uninstall via REGEDIT, but it carries a large risk unless you're comfortable working within the registry.
I doubt that you've tried a clean install, because if you had and you still have the problem, then it follows that you either got bad hardware or a duff Windoze CD.
The REGEDIT way is to firstly backup your registry via FILE>EXPORT commands. Now go to EDIT>FIND and type in the name of the programmes (individually of course)in a variety of ways e.g. Freeserve might be the name or FSERVE or FS, ensure that you've checked KEYS, DATA AND VALUE. Now search from H_KEY_CURRENT_USER onwards and remove every instance for KEY & VALUE, and change the dialogue of every DATA (if they exist).
Repeat for every programme in every format you can think of and with any luck, in a few hours time, you may have deleted them. If your PC totally screws up, boot to DOS (normally press F8 on boot and choose COMMAND option) and type in SCANREG /RESTORE at the prompt and hit ENTER. Then choose a date when it was working OK from the five listed.
Good luck!
Regards
Phil