Get-PrinterDrvier cmdlet complains about unreachable RPC server

I am trying to receive a list of installed printer drivers from several Windows 7 and Windows 10 machines.

Get-PrinterDriver -ComputerName Win7Machine

This works on some of our Win7 machines and on others it doesn't.

HRESULT 0x800706ba translates to: The RPC Server is not reachable.

Okay fine, so I suspected that there is something wrong with our modified RPC configuration. But Get-Process on the same machine returns with results.

Get-Process -ComputerName Win7Machine 

So any idea on what could be wrong here?