@ Steven Gail (aka Zyndstoff), your link didn't work for me.
@ Nilbog,
I assume you are using Windows Firewall from your lack of responding to my question?
Here is how to uninstall and do a clean install of Avast:
1.Download
Free:
http://files.avast.com/iavs5x/setup_av_free.exe2. Download the Avast Uninstall Utility
http://files.avast.com/files/eng/aswclear6.exe and save it to your HDD.
3. Disconnect from the Internet at this time.
4. Go to Control Panel and uninstall Avast through Add/Remove Programs if possible and reboot.
5. If Step 4 fails, boot into
Safe Mode (hit F8 repeatedly) and run the Avast Uninstall Tool.
6.
Reboot.
7. Install the newest version of Avast and
reboot.
8. Get Internet access and register your copy or add the license key for Free:
Free –
http://www.avast.com/registration-free-antivirus.php9. Update the Avast definitions.