RAM:
I have too many unneeded programs loading at start up that are draining my available RAM.
Yes, that is an issue we need to correct, but you have other issues that I believe need to be addressed first.

http://www.processlibrary.com/directory/files/svchost/ <<< read this:
Acting as a host, the file svchost.exe creates multiple instances of itself.
Defrag: If the program you downloaded worked, fine. I would like to know what error message you get when you try to run the Windows XP defrag, that might tell us why it is not working?

Combofix: delete the program (right click) and download it again, this time before you save it to the Desktop, checkge the name like this:

You must rename it before saving it, save it to your Desktop.




I will comment briefly on any number in the last post that needs a comment.

2. Can be many reason and difficult to troubleshoot without error messages. Out of date drivers often cause this and you had three out of date, are they updated now?

3. Spybot S&D is the least of your problems. Please do not try to use it. Once all other issues are resolved, then you can uninstall it and reinstall it, that will likely fix issues with the program. If not, you can discuss that with Spybot S&D experts here:
http://forums.spybot.info/forumdisplay.php?f=4

4. post error messages word for word.

5. What browser are you using when this happens? Did you try another browser? There is likely malware still onboard, that is why I am trying to get combofix run. The situation is that the computer was in poor shape and there was much to do.

6. Post error/message you get when you try to run it. Have you run chkdsk on this computer recently?
http://support.microsoft.com/kb/315265

Besides running combofix, please also update the diagnostic at PCPitStop and post the link.

Thanks