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Thread: PC Clock keeps going back one hour exactly every boot on Win 7

  1. #1
    Join Date
    Oct 2009
    Posts
    38

    PC Clock keeps going back one hour exactly every boot on Win 7

    Hi -

    Have Windows 7 Ultimate x64 and the clock keeps going back exactly one hour practically every time I reboot. This has been happening ever since i thing we went into GMT+1 hr (British Summer Time); I have tried all the different internet sync services offered, have tried having none, have tried turning off the daylight -saving time auto-adjust, but it just keeps returning to exactly one hour behind the actual time. I figure if it was a bios battery problem then it wouldn't be exactly one hour behind like that... I've had bios flat batteries before (not on this PC) and I was getting crazy dates and times like 2094 and any time of the day/night. Any ideas? The internet sync pulls in in line every two days or so I think, but it's out by that hour the rest of the time.

    Sys spec:

    Win 7 Ultimate x64 dual boot with OS X Leopard 10.5.7 (using BootThink v1)
    Sony Vaio VGN-NR280E
    ICH8/Mobile Intel 965 Express Family chipset
    Intel GMA X3100 Video (QE/CI enabled)
    Intel Core 2 Duo 1.66MHz T5450 CPUs
    4GB PC2-5300 667 DDRII RAM
    200GB Fujitsu Fast SATA HDD
    'n00b' is just 'boon' spelled backwards. We all had to start somewhere.

  2. #2
    Join Date
    Feb 2009
    Posts
    455

    Re: PC Clock keeps going back one hour exactly every boot on Win 7

    Quote Originally Posted by ptolomy_was_right View Post
    I figure if it was a bios battery problem then it wouldn't be exactly one hour behind like that...
    Thats correct but the main reason of getting the clock behind is the Cmos battery. We can observe such kind of pc behavior when cmos battery is dead. I guess Windows Update can help you little bit in this case coz will update the system clock on a regular time automatically. Anyways, just check out this post Windows Clock Is Too Slow . Its not for windows 7 but i hope you can have some idea for your solution.

  3. #3
    Join Date
    Dec 2007
    Posts
    1,602

    Re: PC Clock keeps going back one hour exactly every boot on Win 7

    Yes you will have to check some settings in your BIOS to confirm the clock is correct. I think microsoft also released a Windows Update for this kinda of problem. You can also try to make OS X switch its clock to local time from UTC whenever it shuts down and then switch it back whenever it starts up. The exact solution can be found here. Hope that helps.

  4. #4
    Join Date
    Oct 2009
    Posts
    38

    Re: PC Clock keeps going back one hour exactly every boot on Win 7

    OK, sorted that little problem out... my BIOS clock was still one hour behind. Sure baffles me why it changed with the clocks twice a year for the last 2 or so years though... maybe because I'm now using a Bootloader (BootThink)?

    Thanks for your time, yo
    'n00b' is just 'boon' spelled backwards. We all had to start somewhere.

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