Cannot register certain DLLs

[realtnt]

Hi Everyone,

 

I'm having an issue with a 2012r2 server I've inherited. It started when I was trying to figure out a problem with VSS which didn't allow to take a backup. One of the suggestions was to unregister and re-register some dlls, however, now I can't re-register some of them.

 

I get the following error messages - which are different for different DLLs.

 

es.dll

vssapi.dll

 

The module "xxxxx.dll" was loaded but the entry-point DllRegisterServer was not found.

Make sure that "xxxxx.dll" is a valid DLL or OCX file and then try again.

 

 

eventcls.dll

Vssui.dll

swprv.dll

 

The module "xxxxx.dll" was loaded but the call to DllRegisterServer failed with error code 0x80070715.

For more information about this problem, search online using the error code as a search term.

 

This obviously stops VSS from working. When I try to do a vssadmin resize for example I get an error in the Event Viewer:

Volume Shadow Copy Service error: Unexpected error calling routine GetProviderMgmInterface. hr = 0x80042304, The volume shadow copy provider is not register in the system.

 

I've done quite a bit of searching but haven't found anything that I can use.

 

I've done chkdsk with no issues and a sfc /scannow returned that "sfc windows resource protection found corrupt files but was unable to fix some of them". I tried sfc /scannow in safe mode with the same result.

 

Any help would be greatly appreciated!

 

Theo