Malware - Vista Antispyware Purchase

Hello
Have AVAST registered as my antivirus, but last night the Avast symbol was replaces by the Vista sheild and now I cannot use the internet at all, am being pointed to purchase Vista antispyware…? Look from work internet today, I see this may be malware? Not very good technically…why did Avast fail to recognise this, and how can I get rid of it

http://remove-malware.net/how-to-remove-vista-antispyware-2010-rogue-anti-spyware/

Please help
Thanks
jazz

First of all, please remove the link because that site is known to fake security software.

http://www.mywot.com/en/scorecard/remove-malware.net

Second, Follow this removal guide for Vista Antispyware by Bleepingcomputer.

Boot time Avast Antivirus Scanning
http://www.digitalred.com/avast-boot-time.php

Check your computer for Malware with

Malwarebytes Antimalware http://filehippo.com/download_malwarebytes_anti_malware/
after install click UPDATE and run quick scan, click on REMOVE SELECTED to quarantine anything found

SUPERAntiSpyware http://filehippo.com/download_superantispyware/
Are cookies really spyware and are they dangerous?
http://www.superantispyware.com/supportfaqdisplay.html?faq=26

If anything is found come back and post the scan logs here