As far as Plug in Suite 5 is concerned have you tried right-clicking on the Setup.exe of the program and selecting the "Run As Administrator" option?
Some things to try for this problem, "4201 The instance named was not recognized as valid by a WMI data provider."
How do I restore security settings to the default settings?
http://support.microsoft.com/kb/313222/#appliesto
"I researched several forums and none of the suggestions worked. So I compared the folder permissions to c:\windows\system32\logfiles\wmi\RTbackup to a working machine. Navigate to RTbackup properties and check security settings. It requires SYSTEM - full control. I added this permission and rebooted PC to fix the issue. I can now access my event viewer".
You find the above quote near the bottom of this old and very long thread, it goes from 2007 up until the present..
Event log error 4201 - ERROR_WMI_INSTANCE_NOT_FOUND