Hi Rick,
It worked. Thank you very much. This is what I did;
1. I had downloaded the file "setup_av_free_6.0.1367.exe" to my desktop.
2. I disabled my wireless connection.
3. I had 7.0 avast free already installed.
4. I ran "setup_av_free_6.0.1367.exe" file and restarted my laptop.
5. When I checked the version of avast, it was already 6.0.1367. So I did not need to uninstall anything.
6. I am able to connect to my work VPN fine as it is now.
Thanks again to you and Nord.
Regards,
Seckin