I can probably give you a copy of Kapersky MWAV AV on a CD.
Boot to safe mode and run a file called mwavscan.exe
Let it run and scan entire PC for viruses.
Alternatively, you can try to use the online scanners.
I am also curious if your laptop does not have a hard drive-based OS recovery tool or a tool to create OS recovery CDs/DVDs. That is what is done nowadays.
All else fails, you will probably have to give lappie to an experienced technician.