When you attempt to start the WSUS (Windows Server Update Services) WSUSAdmin Web application, you receive:
Server Error in '/WSUSAdmin' Application
There is not enough space on the disk
Description: An unhandled exception occurred during the execution of the current web request.
System.IO.IOException: There is not enough space on the disk.
The stack tracker had the following line in it \[HttpException (0x80004005):
Failed to create temporary files directory 'C:\WINNT\Microsoft.NET\Framework\v1.1.4322\Temporary ASP.NET Files\wsusadmin\ebf3efo7
This behavior occurs because you have disk quotas installed on the WSUS server and the NT AUTHORITY\NETWORK SERVICE account has a a quota limit.
To resolve this issue, remove the quota limit from the NT AUTHORITY\NETWORK SERVICE account:
1. Using Windows Explorer, right-click the volume that has disk quotas configured and press Properties.
2. Select the Quota tab.
3. Press the Quota Entries button.
4. Double-click the NT AUTHORITY\NETWORK SERVICE account.
5. Select Do not limit disk usage and press OK.
6. Close the quota dialog.