I've been running PowerShell as admin for a while on this Windows Server 2008 R2 server. Today I noticed that the security dialog shows that the publisher for it is Unknown. I'm fairly certain Microsoft publishes PowerShell. I'm also fairly certain that's what used to be displayed, so now I'm concerned that my PowerShell installation is corrupt.
There doesn't seem to be a simple way to re-install or repair PowerShell on Windows Server 2008 R2. I installed WMF 4.0 but the problem persists.
How do I make sure I run the trusted PowerShell.exe?