Norton 360 will not run, ad-aware finds multiple infections, what do i do?

Hi there, I have a problem, a few weeks ago my boyfriend's computer has slowed down considerably and 3 days ago it went insane. What is happening: - HP installer keeps popping up - something called Malware Alarm keeps appearing even when I uninstall it. - there are files on it that were never... show more Hi there,

I have a problem, a few weeks ago my boyfriend's computer has slowed down considerably and 3 days ago it went insane. What is happening:
- HP installer keeps popping up
- something called Malware Alarm keeps appearing even when I uninstall it.
- there are files on it that were never installed.
- Some popups show up telling me to buy spyware and other stuff.
- IE opens webpages without being told to.

So I went and bought Norton 360. Installed it, but the program runs for a couple minutes and gives me "Norton 360 process has stopped running. Please Restart your computer." after which message Norton does not work. I asked for help the symantec support but they keep telling me to use Norton Removal Tool and reinstall it. I did. 4 times. Same thing over again.
So I downloaded Ad-Aware, disconnected the LAN and scanned the computer. Got 1158 infections. Removed them. So this morning I run Ad-Aware again and I get 113 infections. HELP??
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