It's possible I could have overlooked something, but I don't see anything in your log that would indicate a problem (with the possible exception of the Start page that was removed by a moderator).
You didn't give a specific problem other then the computer running slowly lately so maybe some of this will help. I realize you said you clean and optimize regularly, but go through everything listed in case there is something you haven't done.
For every user account listed under C:\Documents and Settings, delete the entire contents of these folders:
Local Settings\Temp
Cookies
History
Local Settings\Temporary Internet Files\Content.IE5
Delete the entire content of your C:\Windows\Temp folder
Do a search for
*.tmp and delete everything found
Empty the Recycle Bin
Run Disk Cleanup, Scandisk, and Defragment
You have quite a few processes running; that could be what's slowing your system down. Check this site for advice on how to set them:
http://www.blackviper.com/WinXP/servicecfg.htm
Hope this is of some help.