[SOLVED] Help! computer's clock is changing all the time!

[danezeq]

i dont think it's the battery on the motherboard beacuse it happen also when pc is turn-on, while on windows.
it moves 1 hours back few times in a day, espcially on mornings. i haven't figured out any resoning for that yet.

i think it started since i tried to boot with usb stick using this methood:

View: https://www.youtube.com/watch?v=r-o6OK8Q9hI

and also intalled 2 apps "HFS+ for Windows" and "TransMac" (but uninstalled them since then.
Maybe is has some connection with these actions?

 

[Ralston18]

Where/how is the pc getting date & time?

Check Windows Date & time settings.

Type "Date & time" into the search box.

My thought is that one or more of the configuration settings are incorrect. May have been reset via the macOS install....

Check the current settings.

 

[thx1138v2]

Also check Scheduled Tasks. Someone may have set it up to get date/time for a different time zone.

 

[danezeq]

Where/how is the pc getting date & time?

Check Windows Date & time settings.

Type "Date & time" into the search box.

My thought is that one or more of the configuration settings are incorrect. May have been reset via the macOS install....

Check the current settings.

i know this window. i open it many times druing the day to turn off and then turn on the set time automatic feature to get it update to correct time.

 

[danezeq]

Also check Scheduled Tasks. Someone may have set it up to get date/time for a different time zone.

What shoul i look for in this window?
But... the time changes even i the pc is turned off.
every morning i turn on the pc and the time is incorrect before i even log on to windows.

 

[Ralston18]

Try a new CMOS battery just as a matter of elimination.

 

[danezeq]

Try a new CMOS battery just as a matter of elimination.

thanks.
just a question: if it's really the cmos battery, is it make sense that time changes even when pc is turned on (while on windows)?

 

[Ralston18]

Yes: there could be something else going on.

Could be some other app running in the background and trying to sync date/time for whatever reasons of its' own.

Perhaps the date/time source could be having problems.

Are the date/time changes consistent? For example, the date changes one day, time changes 3 hours, etc..

Always the same amount of change? What about time zone. Is that always the same?

= = = =

What does the CMOS battery do?

Many things including date/time.

Reference (and you can find other similar references):

https://www.electronicshub.org/symptom-of-a-cmos-battery-failure/

From the link:

"If you have a dying CMOS battery your computer will have problems booting up. You might also notice other changes like disappearing drivers and incorrect date and time."

A replacement battery should be inexpensive and straightforward to install.

= = = =

Then, if the problems continue look in Reliability Monitor/History and Event Viewer.

Either one or both tools may be capturing some error codes, warnings, or just informational events when the date/time gets changed.

 

[danezeq]

ok, tried new battery. still the same eproblem!

 

[Ralston18]

Where/how is the computer now getting "its'" date and time?

What is the time change pattern: you mentioned "hours back" - does that mean that the time loses an hour at some point and then again loses another hour later on?

Then you manually change time/date and the problem starts all over again - correct.

What is the pattern? Does the date change as well?

If you uninstall or otherwise remove the Mac OS does the problem end?

And/or any other traces of anything "Mac" on the PC.

 

[thx1138v2]

Are you on a LAN with server(s)? It might be that the server is setting the time and propagating it across the LAN.

I worked in an office where a neighbor was having the problem you describe and after some research he found the server was setting the time at various times throughout the day and changing the time on the client machines.

 

[danezeq]

i manually have to update it from internet every few min.
the pattern is so not clear! some times it move hour back, sometime just few min!
in general the clock change more on mornings and noons. and then in the evening the problem doesnt occour.

i dont have any macOS installed. ijust run the installation one time and exited. it installed nothing!
maybe should i try to re install windows?
but the thing is the clock stops when pc is off. so it's seems like hardware issue.

 

[danezeq]

Are you on a LAN with server(s)? It might be that the server is setting the time and propagating it across the LAN.

I worked in an office where a neighbor was having the problem you describe and after some research he found the server was setting the time at various times throughout the day and changing the time on the client machines.

no it's a pc at home.

 

[danezeq]

i still have no clue! is my pc just ruined? what kind of error is this anyway? i never heard of that.

 

[Ralston18]

This:

"the thing is the clock stops when pc is off". Meaning that the time is wrong when the pc is turned on again. How "wrong" - perhaps showing the time when the pc was turned off?

If the PC is left on and completely taken off of the network and internet for a couple of days does the time still change?

= = = =

Take another look via Reliability History/Monitor.

There may be some error code, warning, or even an informational event just before or at the time the clock changes.

The time line format may help spot patterns: for example something that happens more in mornings and around noon.

Three other places to look:

Task Manager - look for some process being launched at startup. Something you do not recognize or expect.

Task Scheduler - look for some trigger that launches an app and then there are subsequent time changes.

Process Explorer (Microsoft, free) - again looking for some unknown or unexpected process that could be responsible for the time changes.

https://learn.microsoft.com/en-us/sysinternals/downloads/process-explorer

Start keeping a list of the time changes; when they occur and specifically how much of a time change.

 

[danezeq]

SOLVED! i reseted bios using screwdriver, found it on the manual.
thank you all for your answers!