Re: XP and bios

Hi , so if the windows clock out of sync with bios clock with it affect
windows xp boot up process ? i mean like not responding or error.
Because when i start windows, there is a hidden error about my windows
time not correct. Windows hangs at welcome screen but i press alt+tab,
there is a hidden windows error message indicating time error. The bios
time fall back to year 2000. Exact error i didn't copy it down. After i
press enter, then it can only enter windows. Any problem like this
before ?

Regards
Daniel


Blackadder wrote:
> <Danieltbt05@xxxxxxxxx> wrote in message
> news:1122479260.734240.101140@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> > Does WinXP have a clock by itself ? If the computer battery ran weak,
> > will it affect WinXP from booting up normally ? My machine battery was
> > weak and the time was reset to previously. Windows can't booted into
> > desktop and there is a message indicate time was incorrect. Pls advise.
> > Thanks.
>
> There are actually three clocks. The RTC is the only real clock, as it
> maintains real time (RTC = Real Time Clock)even when power is off, via an
> accumulator/battery. At bootup, the BIOS reads the RTC and begins counting
> time independently of the RTC. Finally, Windows reads the BIOS clock and
> begins counting time independently of both the RTC and BIOS. All three
> clocks can go out of sync quite quickly (even the RTC is not that accurate).
>
> When you change time in Windows (such as when synchronising to a time
> server), both the BIOS and RTC clocks are updated accordingly.
>
> But, if the accumulator/battery (usually a small NiCad rechargable battery)
> fails to charge while power is on not only will the clock lose time
> (ultimately resetting to the BIOS manufacture date/time), but you'll also
> lose CMOS settings when power is switched off. Therefore take a note of them
> before you lose them! You can normally expect to change your NiCad every 3
> years or so, but many will last 5 years or more. It really depends how often
> and for how long the PC is off (while power is on, it is simply recharging).
>
> Replacing the battery should resolve your situation, but you can temporarily
> work around it by changing the BIOS time before booting to Windows.

.

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