What kind of CPU do you have and how fast is it? Also, how much RAM do you have and what kind is it, e.g. pc-3200 ddr 400 etc.

Als, you seem to have one to many virus scanners open I might be wrong but that is what it looks like to me. Get rid of what you don't need.

Here's a way to do it:
Go to RUN and type msconfig.
Then go to startup tab and get rid of the things you don't need.

If you suspect that you also have viruses that are actively running and you can see them in msconfig go to this site and search the name of that process and see if it a virus.

http://www.windowsstartup.com/wso/search.php