I had that mssearnetnet.exe!! God i was gettin pissed off. Is it the one where is changes your homepage to a fake windows security thing, and you get those stupid popups saying that u have spyware and u should download this spyware filled thing. anyway, go to safe mode, kill the process and then go to system 32, find mssearchnet (its a big yellow warning sign icon) aint hard to find, ma pc was fcuked anyway so i just reinstalled, wot did u get it from in the first place?
P.S Make sure to have Spyware Blaster and Microsoft Antospyware installed, they block b.hijacks