Hey there I have a Toshiba M305 s49052 and I want to change the OS to XP due to a virus. This virus is blocking my net access. The problem that I am having is that when I run the Windows xp OS disc, I get a stop error after the disc loads all the funny stuff and is heading to the section where I would format the hard drive. Any suggestions?

so you are posting in the Vista forum ,so i will assume you have vista and are changing back to xp, the laptop is fairly new so i will also assume your problem is SATA harddrive problem ,xp does not have sata drivers in it by default so you would need to create a new xp install disk slipstreaming the SATA drivers into [good program to use is nlite] you need to acquire the driver from Toshiba .also there might be a setting in the laptops BIOS to change a setting from sata mode to ata mode not sure where in there but give a look for it ,,it might be easier to either just to reinstall Vista or go to our spyware ,virues and other nasties section to get help removing the virus

Thanks much worked like a charm.

your welcome