got to C properties and use disc clean, check all boxes in dialog, clean, reboot.
set pagefile manually to 1024-12000 MB, if not done already. reboot.
dl the ccleaner and superantispyware.
reboot and use ccleaner to clean win, use the included reg cleaner after that. reboot.
update SAS and run full scan. all cookie related finds can be deleted, all other entries make sure its nothing you need.
clean and reboot.