When I open my home computer the date and time start form zero I mean from 1/1/2003??

When I open my home computer the date and time start form zero I mean from 1/1/2003


And time0:0:00


So I must change the date %26amp; time to I can used internet with out any problem|||You could have a flat cmos battery. Normally the system should warn you on bootup, you could also have a virus. I'd suggest running a full virus scan of your system. If that doesn't throw up anything then I'd suggest you replace your cmos battery (if you know how to) or take your computer to a professional and get the battery replaced.