Hi members
I am not able to go to antivirus websites www.avast.com in my browser like firefox, IE, chrome,but able to update virus definitions.I am using avast free edition. How to remove the malware/spyware. After Full scan also facing same problem.
Check for malware with this
Malwarebytes Anti-Malware 1.51. http://filehippo.com/download_malwarebytes_anti_malware/
always make sure the program is updated before you scan
click on the remove selected button to quarantine anything found
post the scan log here
Def a trojan redirector malware as blocking antivirus sites. Check windows host file for extra entrys
HOSTS file redirect a common malware tactic to block AV sites making it difficult to remove malware - 127.0.0.1 check your HOSTS file using notepad or a text editor of your choice, C:\WINDOWS\system32\drivers\etc\hosts or do a search for HOSTS to find it if not there.
Once open you are looking for entries with avast.com on the line, you may well see other AV sites, post the contents of the hosts file. http://en.wikipedia.org/wiki/Hosts_file