Issue when importing certificate by commandline

Hi guys,

Trying to import a certificate on my Windows 8.1 Enterprise computer by commandline. My command works fine for my Win7 computers, but I have major issues getting this to work in Windows 8.1

I have a folder, containing my cmd, a certificate issued from our CA and certmgr.exe.

The command I use (which works on Win7) is:

certmgr.exe -add certificate.cer -s -r localMachine root

This should be pretty straightforward, but not matter which certificate store I try to import my certificate to, I get the error:

Error: Failed to save to the destination store

I'm running the cmd as admin, and have disabled UAC.

Any ideas? I'd really like to get this working!

Thanks!