When you install McAfee Virusscan Professional version 6.0 on Windows XP SP2 (Service Pack 2), pressing Finish generates:

Webscanx.exe has encountered a problem and needs to close. We are sorry for the inconvenience.

NOTE: This problem doesn't happen with McAfee Virusscan Professional version 7.0 and later.

To resolve this issue, contact McAfee about updates for version 6.0.