I recently installed Windows 2000 Professional on a Dell machine which had Windows XP home edition installed (this was so that I could join the computer to a domain). When the OS loads I see the date is wrong. So I try to go into it by double clicking the time icon on the lower right and it return a message I do not have sufficient privileges, even though I am in as administrator!. I tried to change the time/date my going into the BIOS - which it lets me do, but when I start the operating system the time remains unchanged. Why can I not change the time? Is it a compatibility problem (BIOS for XP not the same as BIOS for W2K Pro)?