I too had a unspecified 'something' create this imaginary Group Policy
comepletely out of the blue.
Alas, gpedit.msc does not exist in Vista Home Premium (so the above solution
was a no go), nor was I able to access any tweaks within msconfig > Services
or services.msc to clear this 'Group Policy'.
HP Support offered many suggestions - none worked - and the final upshot was
that they recommended the inevitable full OS install, the last refuge of the
technically confused and something I would only do as an option to a
self-applied lobotomy.
But then, digging around elsewhere on the 'net, there were other references
to this problem and, in one, an offhand comment about various prepackaged
'tweak' programs - and that got me to thinking....
Downloaded Totalidea's free TweakVI Basic, let it install and set up the
'restore and 'snapshots' and then dug around in it. Nothing immediately
obvious there in regards to this problem, but I did set a few (I thought)
unrelaed tweaks, rebooted and....
The Group Policy had been cleared and I've now got access to creating manual
restore points again!
Nope. No idea why - but for free and 5 minutes of setup I was able to do
something that HP Support couldn't AND prevent me from having to do an OS
install.
Fluke? Maybe , but just to let you know...