Sharepoint document libraries not behaving well

Problem: The Sharepoint site works fine but when loading documents (and images) from a document library we are asked to authenticate and an error occurs when we try to authenticate again.

The web server also reports other strange error messages. Like "An I/O operation initiated by the Registry failed unrecoverably. The Registry could not read in, or write out, or flush, one of the files that contain the system's image of the Registry." (event ID 333) and regedit.exe fails to load with error 0xc0000142.

At the end of the day the cause of this problem was that the server was booted with the /3GB switch in boot.ini - and this is not supported by Sharepoint.

Some useful links:

• MS: Enable Kerberos logging