Firefox:
I ran the Clean Tool. Never got the final alert, so assumed no program was ever installed before the Error 13 alert.
I downloaded MB3 and installed it with no Error 13. Ran a scan, which completed.
→ all is fine.
Thanks for your help.
nikhils:
Thanks for your message, but I don't understand you recommending "latest build for MBAM is 2.2.1.1043" when Firefox advises installing latest : 3.1.2.1733. Furthermore, your link sends to a download of mbam-setup.exe, which does not show any version number. Problem solved anyway as indicated above.
Cheers,