On my Windows7 machines, it seems that restore points are reset on a daily basis. I can set several restore points OK, but the following day they all have disappeared and all I'm left with is a daily restore point generated by the system. There seems to be plenty of space for these restore points, so I'm at a loss as to why they are being deleted. Is there some registry item that defines a length of time for the point? On the other hand what is likely to be deleting such points? Note that I run Comodo Internet security version 4, but I don't think that is doing the deletes.