The console of WFBS cannot be accessed and shows the following error:

HTTP 500.19 - Internal Server Error
Module:DynamicCompressionModule
Notification: SendResponse
Error code: 0x8007007e

The Error code 0x8007007e indicates that the issue happens because of a possible load issue. For more information about this error code, refer to Scenario 6 of this Microsoft article: Troubleshooting HTTP 500.19 Errors in IIS 7.

If the WSUS server has been installed on a WFBS web server, it may cause other websites to crash. This might happen because the WSUS IIS site has too much load, which causes other sites on that server to be inaccessible.

To resolve the issue, follow the steps below:

1. Add the "IIS_IUSRS" group to the OfficeScan website with the appropriate privleges. Do the following:
   1. Open the Internet Information Services (IIS) 7 Manager.
   2. Right-click the OfficeScan website, and then select Edit Permissions.
   3. Click the Security tab, and then click Edit.
   4. Click Add.
   5. Click Locations, select the local computer, and then click OK.
   6. Type "IIS_IUSRS" in the box, and then click Check Names.
   7. Once the user name has been validated, click OK.
   8. Make sure the newly added group has the following privileges:
      • Read & execute
      • List folder contents
      • Read
   9. Click OK.
2. Use the command below to set the configuration for IIS:

   %windir%/system32/inetsrv/appcmd.exe set config -section:system.webServer/httpCompression /-[name='xpress']

3. Restart the IIS Service, then try to login to the WFBS console again.