I'm running Windows 7 Home Premium and am having problems on booting up. Every time I press power, Windows starts to boot, gets to the coloured boxes, screen goes blank (not blue), reboots and a DOS like screen appears with options to start in 'safe mode or normally' then an error message says "Windows was not shut down properly". If allowed to boot normally, all is well. When I run CCleaner, it takes forever to work through something called Task Bar Jump Lists. What are Task Bar Jump Lists - I didn't even know I had them. Some programmes (mostly games) take over 15 minutes to launch. Are these issues related? I seem to have this problem recurring whenever I run a Windows update. I've got Sophos virus protection and have run Spybot Search & Destroy - nothing found. Be gentle, I am a rank amateur newby.