So there’s this “security” software built into the BIOS of many laptops called CompuTrace. It is sorta like “LoJack” for laptops. If your laptop is ever stolen, CompuTrace can “phone home” to notify a server where your laptop is. It is written by a company called Absolute Software and then provided to laptop manufacturers so they can include it in the BIOSes they supply for their laptops. If you have one of these laptops, then you have this software in your BIOS and there is no way for you to remove it.
CompuTrace is at least partially a rootkit. Absolute designed it that way intentionally so that a thief cannot remove the software by formatting the disk or reflashing the BIOS. The problem is that rootkits can cause all kinds of other horrible problems for you, the user.
The CompuTrace rootkit in your BIOS will write the following files (and possibly others) to your Windows filesystem:
The rootkit will also hijack the AUTOCHK.EXE process that normally runs during Windows boot, and instead run its own code.
One issue this rootkit may cause: chkdsk may not run during boot like it is supposed to.