|Download and burn to a DVD an ISO for Kaspersky Rescue disk. This is a Linux based Disk. It will load into RAM only (unless you tell it to load to the hard drive - which do NOT).|
Once it's booted to a standard windows style desktop it will go online to update itself; after-which it will scan the system fully for any pests it can find - and deal with them.
You may need to go into bios settings to enable DVD as first boot-device; but try booting with the DVD before going there. Best not to go into that area unless really necessary...
and this last link is detailed how to use it - from another excellent tutorial site.