Powershell: accessing remote registry via WMI

I have a script that simply connects to the registry of a remote computer via WMI and Powershell:

$Server = server1
$HKLM = [UInt32] "0x80000002"
$WMI_Reg = [WMIClass] "\\server1\root\default:StdRegProv"

For the majority of our 300 servers this is fine and I can make subsequent queries on the registry. However, for a select few, I get this error:

Cannot convert value "\server1\root\default:stdregprov" to type "System.Management.ManagementClass". Error: "not found"

These are all 2008 R2 servers. Originally, there were issues with invalid WMI providers and I had to recompile cimWin32.mof prior to this error.

Any ideas on what I can do next?

Thanks

These errors are usually caused by missing WMI classes. The solution for this kind of error usually involves couple of steps.

The solutions could be found under this link: https://blogs.technet.microsoft.com/askperf/2014/08/11/wmi-missing-or-failing-wmi-providers-or-invalid-wmi-class/

Important: as per Microsoft, please don't rebuild mof files as the first step:

"Rebuilding the repository or recompiling all of the .mof files as a first action when other steps should be taken first can cause damage to the system and/or to installed applications."