About two days ago my Lenovo V570 laptop (Windows 7 Home Premium) slowed to a crawl. After checking the resource monitor I found that the "Highest Active Time" is always at 100% (Not Disk I/O, just Highest Active Time). When I boot it into safe mode everything works fine, which led me to believe it is some running service/process that is causing the problem.
I used Services.msc (in safe mode) to switch every automatic startup service I could to manual (with the exception of "Group Policy Client", "Task Scheduler", and "Norton 360" which it wouldn't let me change.) When that didn't help I uninstalled Norton 360, which didn't do anything either.
This problem has occurred once before and was solved by a reformat of the system. Unfortunately I don't have access to a large enough external hard drive to store my data at the moment. I recently installed FileZilla, VLC, and Office 2007 Compatibility pack, all of which I uninstalled without any luck. The slowdown appears to occur shortly after I enter my windows password, usually during the Welcome loading screen.
Any ideas? I'm all out.