I did a clean install of windows 7 yesterday, and before I had even started installing programs I noticed my system was sluggish. After loading up on my programs and getting my documents in place, it has been basically unusable without tweaking in ways I'd rather not stick to. I've run a symantec scan, lavasoft adaware scan, and spybot search and destroy scans, all showed, as predicted, that my system is clean. I've been able to use my computer a little if I go into 'services' and set 'windows search' to 'manual' and 'stop,' but ideally I would like my system to be indexed at some point. As of now though, if I leave this on, it uses about 45-60% of my cpu. As for the "NT kernel & system" problem - it shows up as "image name - system" "user - system" "description - NT Kernel & System" in task manager. Using Process Explorer, I was able to pinpoint that the problem was with 'smss.exe,' or 'session management subsystem,' which it appears from a few google searches can't be turned off. This process is constantly using 40-60% of my CPU, and has since I first installed windows 7, and I have not found a way to change this. Anyone have any advice for me? I have 3g of ram, and can't think what else about my hardware would be relevant. I've run drivermax to make sure that all my drivers are correct, and have tried endless fiddling with startup, but nothing seems to help the NT problem, and the only thing that has helped the indexing problem is turning it off completely. I never thought I'd say this, but I already miss Vista...please save me! Thanks!