Whenever I start my computer the date changes to Jan 1, 2001 besides manually changing the time what can i do?

Answer 1

replace the CMOS battery on you pc.

Answer 2

Replace the CMOS Battery

To remove:
Unplug the power to your PC.
Open the case
On the motherboard find the CMOS Battery. Looks like a calculator battery. Round, about the size of a U.S. Nickle.
Touch any metal part of the computer case to ground yourself
Carefully remove the battery, it usually clips into place. Some are soldered into place. I suggest bringing the PC to the repair shop if the battery is soldered into place.

In 99% of the computers, the battery is a CR 2032 and can be purchased at about any department store, check the jewelry counter where the watch batteries are sold. The cost is usually less than $5 USD.

To replace:
Touch any metal part of the PC case to ground yourself.
Carefully clip the battery into place, + or writing side up.
Close the PC case
Plug power cord back in
You will need to reset the clock one last time as all CMOS settings are lost when you remove this battery. Your PC should run OK from the default settings.

Answer 3

This problem is occurring due to the CMOS and this can be two things. The rare problem is that your CMOS is corrupted. Chances of that though are very , very, very rare.

The more common solution and probably what it is when this happens is that the battery for the CMOS has finally given out. This usually happens on computers that are 5+ years, but I have seeen it on newer computers. The battery is a 3.0v watch battery that is located on the motherboard. This part can be replaced easily.

Answer 4

The security certificates that allow you to browse various websites securely have expiration dates, typically within the next year or so. Since your computer believed it was 2099, all of these certificates were already expired as far as it was concerned, and invalid. Most cookies sent by websites also have expiration dates. These are rarely set so far into the future. So, your browser was receiving cookies that, as far as it was concerned, were already expired and therefore ignored. It was as if you had cookies disabled, which explains the problems there. If you had been able to register, Yahoo would have set your registration date based on its servers' own reckoning of time, not your computer's, so your trick would not have worked.

Answer 5

What they said...

The battery in questions is little more than a glorified wrist watch battery. While you could probably buy a watch battery and install it, play it safe and go to a qualified tech, or a store that specialises with hardware.