Help: Windows 7 System Clock is Running Fast

Written by Alan Friday, 2 September 2011 07:00

Many users may not have experienced it, but there is a bug which causes the Windows 7 system clock to gain time at a pretty quick pace.  It’s seems to only effect the 64-bit edition, but if you have had this problem in the 32-bit version then let us know in the comments below.  The problem should have been fixed long ago, but it continues to persist.  Just the other day, I purchased a new laptop with Windows 7 64-bit and had it happen – and this came with SP1 installed!

If you have this happen on your new PC then you will know it pretty quickly – my system clock gained almost 12 hours in the first 24 hours I owned it.  You can, of course, reset the clock, but it will just gain the time back.  You will actually need to reset the clock, but that comes later.

As always, Microsoft has a “fix”, which is really just a work-around.  I am not even sure it’s an official work-around, but it did come from a forum moderator on the Microsoft Answers website.  It’s actually pretty easy to handle, even for novices.

Click Start => All Programs => Accessories => Right click Command Prompt => Run as Administrator.

windows 7 command prompt Help: Windows 7 System Clock is Running Fast

Run the following command:

net stop w32time

w32tm /unregister

w32tm /register

net start w32time

w32tm /resync

Restart your computer, then reopen the Command Prompt, again as an administrator.

Now follow these instructions:

1.      Open an elevated command prompt. To do this, click Start, click All Programs, click Accessories, right-click Command 

                      Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the

password, or click Allow.

2.      Type the following command, and then press ENTER:

               sfc /scannow

The sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.

sfc scannow Help: Windows 7 System Clock is Running Fast

If you have any out-of-date files then allow them to be fixed, restart the computer again, and run the System File Checker one more time to make sure everything is up to date.

You may still need to adjust your system clock manually (I did, but not everyone has to).  Once this process is done you should have no more problems with a fast-running system clock.  Mine has not gained one second since.


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 Help: Windows 7 System Clock is Running Fast


Alan is the owner and editor of Making Windows Easy. In addition to writing about technology he is also an avid distance runner and hiker. Read More

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  1. Anne Freeman   |  Tuesday, 06 March 2012 at 3:31 am

    Hi, I did all that a few months ago on my ASUS motherboard / Windows 7 system and the problem went away. Unfortunately it has now started again. First try at running the above combination has had no joy. About to try again.
    Has anyone any more ideas?

  2. Doug Belfiore   |  Monday, 02 April 2012 at 2:29 pm

    I had a similar problem, where my system clock ran 22 minutes faster than actual time. I tried the CMD Prompt screen fix outlined above, but no results. I’d read a few posts on other discussion boards suggesting a complete shutdown, then unplug the machine for a few seconds/minutes, then power up and boot the machine again. Something about resetting something on the motherboard.

    Anyway, I tried that earlier today, and so far, so good. The problem usually shows up within a few minutes after bootup. It’s now over three hours since i did the complete shutdown/unplug, and so far, so good…

  3. Brock Lindsey   |  Saturday, 05 January 2013 at 3:40 pm

    FYI I have a copy of windows 7 enterprise 32 bit that this happened on, so it’s not isolated to just 64 bit OS

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