Did that laptop come with windows 7 pre-installed? If it did, did you make a set of recovery disks for that PC yet? If you haven't you might want to before you go any further. If that PC did not come with a Windows 7 Install disk and relies on the recovery partition to re-install windows 7, you could break that functionality if you wipe out the boot sector. If this is the type of infection I think it is you will have to wipe out the boot sector to get ride of it. I'm no expert on this but I'm thinking when you do use the recovery/restore to factory settings option from the boot menu its not over writing the boot sector (system reserved partition), its just restoring the windows image to the second partition (c). If it was I would think that would wipe out any hidden nasties. So following that logic you would have to boot from some other media and erase the boot sector, maybe even wipe the whole drive, and start over.