I'm not very fond of Ad-aware, but definitely keep Superantispyware, and Malwarebytes for occasional scans. They're, currently, the best two free tools on the market.

Thank you so much Broni.

I've done exactly as you said - including changing my banking passwords!
I ran a malaware scan last night and got this result...

Malwarebytes' Anti-Malware 1.36
Database version: 1947
Windows 5.1.2600 Service Pack 3

11/04/2009 07:57:00
mbam-log-2009-04-11 (07-57-00).txt

Scan type: Full Scan (C:\|)
Objects scanned: 305724
Time elapsed: 5 hour(s), 7 minute(s), 45 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)


SO I AM OVERJOYED!!!

Would clearly have been impossible for me to do without your help, I'm really grateful.
I'll be making a donation to support your worthy cause.

Thanks again

Adrian