Random processes at every startup...

I recently bought a new PC and bought a copy of Vista Ultimate, which has been really good until about a week ago when I started getting these really annoying processes starting up every time I turn the PC on.

Every startup, windows firewall informs me that its blocked a certain process. Only problem is that once I've blocked that process, it will try and run next time I start windows but uses a different process name. This is the names it's used so far:

sysxchlg.exe
sechlajw.exe
netdnsyb.exe
rdlagrpe.exe
drvusbng.exe

I've typed these into google but nothing comes up for them.

I have no idea what these processes are and I've run windows defender, spybot, nod32, avg free and trend micro online scan.

The antivirus programs found a couple of things but didn't seem related to this problem.

Anyone got any ideas how to stop this? Its really bugging me now.

Thanks
Tim

Sorry but i dont have any experience with Vista and malware on that Operating System...

I would consider running some anti-malware programs that are compatible with Vista, aswell as uninstalling all things that may have caused these problems...

Also its worth checking out www.gladiator-antivirus.com
and posting on the forums in the "Help i think im infected" topic for help :)