adding a spyware scan on the avast 4 software

Avast Free Antivirus / Premium Security
1

is this a good idea , I think so

2

Avast already scans for spyware and rootkits.

http://www.avast.com/eng/avast_4_home.html

3

ha , sorry dumb question ! :-X

4

There’s no such thing as a dumb question, That’s how we learn.

If you would like a second opinion on malware, I would recommend Malwarebytes’ Anti-Malware.

http://www.malwarebytes.org/