Troubleshooting: Companyweb and SharePoint Central Admin 'Not Accessible'

Troubleshooting: Companyweb and SharePoint Central Admin 'Not Accessible After Installing KB983444 or KB2345304' Issue

"If you have found that you are unable to browse either Companyweb or Sharepoint Central Administration after applying KB 2345304 (MS10-072: Description of the security update for Windows SharePoint Services 3.0: October 12, 2010), or KB983444," informed Microsoft SBS team. Please refer to following for more information and steps on how to fix the issue:

Solution:

[Source]