Could not create a VHD file in Hyper V, "A Virtual Disk Provider for the specified file was not found"

Issue:
Could not create a VHD file in Hyper V, "A Virtual Disk Provider for the specified file was not found"
Cause:
Backup Exec 2010 R3 drivers for tape library modify registry settings.
Resolution:
http://support.microsoft.com/kb/2013544

Hyper V role fails installation, requires multiple reboots.

Issue description:

Hyper V role installation fails, during start up and message shows up which states the role installation failed, and a rollback is occurring. 

Cause:

For me this was being caused by the system reserved partition (SRP). The SRP was in an offline state. 

Resolution:

I used DISKPART to bring the volume online, and to assign it a drive letter to hold it online. Also I turned Automount back on, it was previously disabled because it was causing the Dell DRAC firmware upgrade to fail. The role addition succeeded this time.

Using Disk Cleanup without Installing the Desktop Experience Suite on Server 2008

How to install the Disk Cleanup application without installing the desktop experience on Windows Server 2008 R2, 2008 x64, 2008 x32. This will avoid having to install desktop themes, media player and so on.

Locate the Cleanmgr.exe and the cleanmgr.exe.mui in the appropriate directory in the table below.
Copy Cleanmgr.exe to C:\windows\system32.
Copy Cleanmgr.exe.mui to C:\windows\system32\en-us.

Then you can run the disk cleaner.

Tables:

Server 2008 R2:
C:\Windows\winsxs\amd64_microsoft-windows-cleanmgr_31bf3856ad364e35_6.1.7600.16385_none_c9392808773cd7da\cleanmgr.exe
C:\Windows\winsxs\amd64_microsoft-windows-cleanmgr.resources_31bf3856ad364e35_6.1.7600.16385_en-us_b9cb6194b257cc63\cleanmgr.exe.mui

Server 2008 x64:
C:\Windows\winsxs\amd64_microsoft-windows-cleanmgr.resources_31bf3856ad364e35_6.0.6001.18000_en-us_b9f50b71510436f2\cleanmgr.exe.mui
C:\Windows\winsxs\amd64_microsoft-windows-cleanmgr_31bf3856ad364e35_6.0.6001.18000_none_c962d1e515e94269\cleanmgr.exe.mui

Server 2008 x32:
C:\Windows\winsxs\x86_microsoft-windows-cleanmgr.resources_31bf3856ad364e35_6.0.6001.18000_en-us_5dd66fed98a6c5bc\cleanmgr.exe.mui
C:\Windows\winsxs\x86_microsoft-windows-cleanmgr_31bf3856ad364e35_6.0.6001.18000_none_6d4436615d8bd133\cleanmgr.exe