Trying to clean a 3 year old windows 7 PC. deleted temp files, ran ccleaner for registry and file cleanup, ran malwarebytes, superantispyware, eset online scanner, trendmicro's housecall online scanner, hitmanpro. Deleted a couple things they found. Used autoruns to see what's starting - nothing unusual. several things though - dropbox, skype, etc.
I ran some different SMART hard drive testers and the drive is OK. Turned off aero.
But the machine is still sloooowwww. It's got several conhost.exe and cmd.exe instances running. can't see how they are starting.
what am I missing?