Setup fails to start due to a computer virus.

Cause:


The computer has been infected by a virus which is affecting Setup.

Solution:


Run a virus detection and eradication utility, and contact a qualified computer technician or next-level support.

CAUTION: Computer viruses can be very destructive and spread easily.
NOTE: For future reference, consider installing a memory-resident anti-virus monitor that runs all the time to detect and report suspicious program behavior as soon as it occurs.