Actually it wouldn't matter what version he has, the definitions are downloaded regardless of the version. You'll need to check all of your startup programs, my guess is you have a lot of crap running in the background that you don't need...
run -> msconfig.exe
Then goto the startup tab and anything you see that you don't need to startup by itself, uncheck the box on it.
The next thing is to goto your control panel and goto add or remove programs, in there search for anything that look suspicious or something that obviously doesn't belong in there. Select it and click remove.
After you check these things make sure you update Ad-aware and your spybot apps and run them to make sure that there isn't anything on your computer making is stall like it is.
Give a virus scan a try, you can use your norton but it won't find anything so go here: