I recently had a series of problems related to malware due to a bad program install. I've cleared most of the largest issues, but the one problem that remains is after booting up the computer for a few minutes, I get a process that initiates from the syswow64 folder and increases CPU usage to around 50%. First it started as svchost.exe *32. But occasionally it would instead be TRACERT.EXE *32. This morning I renamed both files by taking ownership of them and attaching "OLD" at the end, and now my computer uses nslookup.exe *32 from that folder. I don't know how safe it is to keep renaming executables (or if it's even practical to keep renaming them all). Once this problem starts, whenever I go to reboot the system, I get a BSOD.
I am currently using a Win7 OS, SP1. I have run a series of antimalware software and they no longer are able to catch anything suspicious. Is a fresh windows install the only way to go?