I thought this might be the issue with our server, however it is not, and I cannot fix the "All sites are asking for password" issue. I checked the local security policy but that "Access this computer from network" is not infact empty, it contains users, I ran a virus check with various antivirus software, also checked for those files in the windows directory which are the virus but they did not exist, so I thought I would run the me-fix anyway, so I did, rebooted etc, and still the same issue with all sites have user/password box..
I think something has screwed up the authentication in IIS etc, is there a way to fix this? I tried running the Plesk setup program from add/remove programs and clicked on the "Repair" option and it just sat there and after a while it would say "Internal Error 2856. Start_Installation_Dialog" and then Fatal Error - Installation ended prematurely becuase of an error.
If i check Event Viewer it would have these items after trying to run the repair option:
Source: MsiInstaller
Event ID: 11729
Description:
Product: Plesk 8.1 for Microsoft Windows -- Configuration failed.
Any help would be appreciated.