I suffered this error today after installing the latest Version AIM messenger that would be version 6. I discovered I was given no access to my network and sharing folder yet still sporadically had internet access. So Here’s how I managed to fix it.

1. I uninstalled AIM
2. I uninstalled the viewpoint media player which came with AIM
3. I ran a registry cleaner
4. I did the following
   1. Opened my start menu -> all programs -> Maintenance
   2. Right clicked on the command prompt and clicked Run as administrator
   3. once the command prompt opened I entered the following Hitting enter after each entry
      1. Net localgroup Administrators localservice /add
      2. Net localgroup Administrators INTERACTIVE /add
      3. Net localgroup Administrators IUSR /add
      4. Net localgroup Administrators NETWORK /add
      5. Net localgroup Administrators NETWORK SERVICE /add
      6. Net localgroup Administrators SERVICE /add
      7. Net localgroup Administrators SYSTEM /add
   4. I then rebooted my computer

Everything appears to have returned to normal now I suppose for now I’ll just use trillian for AIM and avoid the whole mess all together.