Desktop 6 months old and time gone haywire today.Updated it a number of
times but keeps going slow>

Cmos battery??

On Sat, 31 Jan 2009 20:22:55 -0000, "spud" <(E-Mail Removed)> wrote:

> Desktop 6 months old and time gone haywire today.Updated it a number of
> times but keeps going slow>
>
> Cmos battery??



There's no way to answer that for sure without more info from you.

Before anyone whose clock is running slow rushes out to buy a new
battery, he should first take note of whether he is losing time while
the computer is running or while it's powered off. If it's while
powered off, the problem *is* very likely the battery. But if it's
while running, it can *not* be the battery, because the battery isn't
used while the computer is running.

If the clock loses time while running, try this:

Open a command prompt window (Start | Run | cmd) and enter the
following commands:

net stop w32time
w32tm /unregister
w32tm /register
net start w32time


--
Ken Blake, Microsoft MVP - Windows Desktop Experience
Please Reply to the Newsgroup

Actually the battery only is used when the computer is powered off and
disconnected from the mains (unless the technology has changed over the
years).

There is always power to the M/B (a trickle charge so to speak) when the
computer is plugged in. Notice that there are LED's on the M/B that are
powered on at all times - even when the computer is turned off.

If there is power to the M/B the battery is not used.

If I am wrong, please correct me. (-:

--

Richard Urban
Microsoft MVP
Windows Desktop Experience


"Ken Blake, MVP" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> On Sat, 31 Jan 2009 20:22:55 -0000, "spud" <(E-Mail Removed)> wrote:
>
>> Desktop 6 months old and time gone haywire today.Updated it a number of
>> times but keeps going slow>
>>
>> Cmos battery??
>
>
>
> There's no way to answer that for sure without more info from you.
>
> Before anyone whose clock is running slow rushes out to buy a new
> battery, he should first take note of whether he is losing time while
> the computer is running or while it's powered off. If it's while
> powered off, the problem *is* very likely the battery. But if it's
> while running, it can *not* be the battery, because the battery isn't
> used while the computer is running.
>
> If the clock loses time while running, try this:
>
> Open a command prompt window (Start | Run | cmd) and enter the
> following commands:
>
> net stop w32time
> w32tm /unregister
> w32tm /register
> net start w32time
>
>
> --
> Ken Blake, Microsoft MVP - Windows Desktop Experience
> Please Reply to the Newsgroup

On Sun, 1 Feb 2009 13:01:51 -0500, "Richard Urban"
<(E-Mail Removed)> wrote:

>Actually the battery only is used when the computer is powered off and
>disconnected from the mains (unless the technology has changed over the
>years).
>
>There is always power to the M/B (a trickle charge so to speak) when the
>computer is plugged in. Notice that there are LED's on the M/B that are
>powered on at all times - even when the computer is turned off.
>
>If there is power to the M/B the battery is not used.
>
>If I am wrong, please correct me. (-:

That's the way I've always understood it.

But folks persist in saying a failing CMOS battery is what causes
Windows time to run slowly.

That is NOT the reason.

DDW
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Reply via this group
No email please

On Sun, 1 Feb 2009 13:01:51 -0500, "Richard Urban"
<(E-Mail Removed)> wrote:

> Actually the battery only is used when the computer is powered off and
> disconnected from the mains (unless the technology has changed over the
> years).
>
> There is always power to the M/B (a trickle charge so to speak) when the
> computer is plugged in.


Yes, that's correct, at least for the great majority of computers.


> Notice that there are LED's on the M/B that are
> powered on at all times - even when the computer is turned off.
>
> If there is power to the M/B the battery is not used.
>
> If I am wrong, please correct me. (-:


My understanding is that the trickle charge is insufficient to keep
the clock running correctly. If the computer is powered off, even if
still plugged in, the clock primarily runs off the battery, and if the
battery fails, the clock loses time.



> "Ken Blake, MVP" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > On Sat, 31 Jan 2009 20:22:55 -0000, "spud" <(E-Mail Removed)> wrote:
> >
> >> Desktop 6 months old and time gone haywire today.Updated it a number of
> >> times but keeps going slow>
> >>
> >> Cmos battery??
> >
> >
> >
> > There's no way to answer that for sure without more info from you.
> >
> > Before anyone whose clock is running slow rushes out to buy a new
> > battery, he should first take note of whether he is losing time while
> > the computer is running or while it's powered off. If it's while
> > powered off, the problem *is* very likely the battery. But if it's
> > while running, it can *not* be the battery, because the battery isn't
> > used while the computer is running.
> >
> > If the clock loses time while running, try this:
> >
> > Open a command prompt window (Start | Run | cmd) and enter the
> > following commands:
> >
> > net stop w32time
> > w32tm /unregister
> > w32tm /register
> > net start w32time
> >
> >
> > --
> > Ken Blake, Microsoft MVP - Windows Desktop Experience
> > Please Reply to the Newsgroup

--
Ken Blake, Microsoft MVP - Windows Desktop Experience
Please Reply to the Newsgroup

"DDW" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>
> But folks persist in saying a failing CMOS battery is what causes
> Windows time to run slowly.

The original AT style power supplies did not provide power when they were
turned off. Actually the ATX power supplies can be turned off except the
switch is in the power supply itself, not the front of the computer;
correct?

So those of us familiar with the older technology might tend to think that
turning off the power would require use of the battery, but computer people
just have to make things more complicated.

Richard

The time is always dependent on the CMOS battery. It runs on that computer open or
not

--
Peter

Please Reply to Newsgroup for the benefit of others
Requests for assistance by email can not and will not be acknowledged.

"Richard Urban" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Actually the battery only is used when the computer is powered off and
> disconnected from the mains (unless the technology has changed over the years).
>
> There is always power to the M/B (a trickle charge so to speak) when the computer
> is plugged in. Notice that there are LED's on the M/B that are powered on at all
> times - even when the computer is turned off.
>
> If there is power to the M/B the battery is not used.
>
> If I am wrong, please correct me. (-:
>
> --
>
> Richard Urban
> Microsoft MVP
> Windows Desktop Experience
>
>
> "Ken Blake, MVP" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> On Sat, 31 Jan 2009 20:22:55 -0000, "spud" <(E-Mail Removed)> wrote:
>>
>>> Desktop 6 months old and time gone haywire today.Updated it a number of
>>> times but keeps going slow>
>>>
>>> Cmos battery??
>>
>>
>>
>> There's no way to answer that for sure without more info from you.
>>
>> Before anyone whose clock is running slow rushes out to buy a new
>> battery, he should first take note of whether he is losing time while
>> the computer is running or while it's powered off. If it's while
>> powered off, the problem *is* very likely the battery. But if it's
>> while running, it can *not* be the battery, because the battery isn't
>> used while the computer is running.
>>
>> If the clock loses time while running, try this:
>>
>> Open a command prompt window (Start | Run | cmd) and enter the
>> following commands:
>>
>> net stop w32time
>> w32tm /unregister
>> w32tm /register
>> net start w32time
>>
>>
>> --
>> Ken Blake, Microsoft MVP - Windows Desktop Experience
>> Please Reply to the Newsgroup
>

On Sun, 1 Feb 2009 18:26:23 -0500, "Peter Foldes" <(E-Mail Removed)>
wrote:

>Richard
>
>The time is always dependent on the CMOS battery. It runs on that computer open or
>not

No. Time is independent of the CMOS clock/battery when Windows is
running.

DDW
--
Reply via this group
No email please

I can physically remove the battery (and have done so for an extended test
of 48 hours) and my desktop tower retains correct time.

--

Richard Urban
Microsoft MVP
Windows Desktop Experience


"Peter Foldes" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> Richard
>
> The time is always dependent on the CMOS battery. It runs on that computer
> open or not
>
> --
> Peter
>
> Please Reply to Newsgroup for the benefit of others
> Requests for assistance by email can not and will not be acknowledged.
>
> "Richard Urban" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
>> Actually the battery only is used when the computer is powered off and
>> disconnected from the mains (unless the technology has changed over the
>> years).
>>
>> There is always power to the M/B (a trickle charge so to speak) when the
>> computer is plugged in. Notice that there are LED's on the M/B that are
>> powered on at all times - even when the computer is turned off.
>>
>> If there is power to the M/B the battery is not used.
>>
>> If I am wrong, please correct me. (-:
>>
>> --
>>
>> Richard Urban
>> Microsoft MVP
>> Windows Desktop Experience
>>
>>
>> "Ken Blake, MVP" <(E-Mail Removed)> wrote in message
>> news:(E-Mail Removed)...
>>> On Sat, 31 Jan 2009 20:22:55 -0000, "spud" <(E-Mail Removed)> wrote:
>>>
>>>> Desktop 6 months old and time gone haywire today.Updated it a number
>>>> of
>>>> times but keeps going slow>
>>>>
>>>> Cmos battery??
>>>
>>>
>>>
>>> There's no way to answer that for sure without more info from you.
>>>
>>> Before anyone whose clock is running slow rushes out to buy a new
>>> battery, he should first take note of whether he is losing time while
>>> the computer is running or while it's powered off. If it's while
>>> powered off, the problem *is* very likely the battery. But if it's
>>> while running, it can *not* be the battery, because the battery isn't
>>> used while the computer is running.
>>>
>>> If the clock loses time while running, try this:
>>>
>>> Open a command prompt window (Start | Run | cmd) and enter the
>>> following commands:
>>>
>>> net stop w32time
>>> w32tm /unregister
>>> w32tm /register
>>> net start w32time
>>>
>>>
>>> --
>>> Ken Blake, Microsoft MVP - Windows Desktop Experience
>>> Please Reply to the Newsgroup
>>
>

On Sun, 1 Feb 2009 20:48:46 -0500, "Richard Urban"
<(E-Mail Removed)> wrote:

>I can physically remove the battery (and have done so for an extended test
>of 48 hours) and my desktop tower retains correct time.

As it should.

Here is a long article about Windows timekeeping.

http://blogs.msdn.com/w32time/default.aspx

Toward the end is a general discussion (Tale of Two Clocks) that
should show any rational person why the CMOS battery and clock is not
the reason for time being lost when Windows is running.

DDW
--
Reply via this group
No email please