A couple of days ago there was an update. After that update my system slowed down a lot. The windows explorer takes about 10 seconds to open. The same kind of thing happened with the update in the beginning of last November. Running the disk error check helped a lot (when I finally found some advice). Someone stated that the windows update "revived" some bad sectors, and they caused the problem. Sounds weird, but disk check really made a difference. Then again, so did the update. Any idea if the new thing is the same? Are updates going to cause that every now and then in the future? It's 64-bit windows 7 and Core2Duo E8400@3GHz, 4GB RAM, 130 GB free disk space.