I sympathise with you regarding your sys restore being anonamously turned off. I previously had Winxp home edition with all the xp3 upgrades and MS Essentials monitoring my system. Actually I think its rubbish as it didn't detect bugs that turned my sys restore off along with windows security system resulting in absolute chaos. My PC was old and due for renewal but I was forced to scrap it earlier than planned because of the damage done. I now have a new PC win7 with Superantispy installed as well and regularly use it after suspending MS Ess for the duration. it finds a lot of adware and bugs which MS Ess just can't see.
Sorry my friend but I believe you have some serious bugs - don't gamble on MS finding them. I'm just about to ditch it altogether and buy superantispyware to monitor my system. Spyware Doctor free is also great but won't kill bugs till you buy it but at least you know what's there.