I have a new PC (4 weeks) and run Windows 7 (64bits). Despite pressing continuously F8 when switch the computer on it doesn't go to the Safe Mode. I need to go to safe mode because few times I needed to restore my computer to an earlier date but it doesn't do it either and because of that I thought I could use Safe Mode to restore it. I run Norton antivirus and turned it off but still does not work. Can someone advise please?