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Windows 7: Time is always wrong

13 Sep 2017   #11
mrjimphelps

Linux Mint 18.2 xfce 64-bit (VMWare host) / Windows 8.1 Pro 32-bit (VMWare guest)
 
 

I have dual boot Linux / Windows. I discovered an anomaly between Linux and Windows: Whenever I would boot into Linux, then exit Linux and boot into Windows, the time shown in Windows would be five hours off! I found that the cause of this is that Linux uses UTC (Universal Coordinated Time or Greenwich Mean Time) and converts from there to local time, whereas Windows uses local time. Consequently, every time I would go from Linux to Windows, I would see UTC rather than my local time.


I fixed it by doing a registry edit in Windows:
  • I went into the Windows registry and navigated to here:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\TimeZoneInformation
  • I right-clicked in the right pane and selected New / DWORD (32-bit Value) -- "RealTimeIsUniversal" (without the quotes).
  • I double-clicked on RealTimeIsUniversal and changed the Value from 0 to 1.
I rebooted into Linux, and then rebooted into Windows. Problem solved!

After doing this, I discovered that the computer BIOS was showing time in UTC. But that's ok, because both Windows and Linux now show the correct local time.

There may be something you could do in Linux rather than in Windows to fix this; I did this fix in Windows.


My System SpecsSystem Spec
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13 Sep 2017   #12
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

Well I am no expert at all but maybe this will throw some light on it too Jim I am only guessing here because I am not that familiar with Linux stuff

Dual Boot: Fix Time Differences Between Ubuntu And Windows ~ Web Upd8: Ubuntu / Linux blog
My System SpecsSystem Spec
13 Sep 2017   #13
ethel

Windows 10 Pro 64 bit
 
 

Thank you mrjimphelps and John for helping out BLUE838.
My System SpecsSystem Spec
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13 Sep 2017   #14
The Howling Wolves

Windows 7 Home Premium 64bit
 
 

Had same problem so I replaced the battery on my laptop.
Works perfectly now.
My System SpecsSystem Spec
14 Sep 2017   #15
J.R.

W7PRO/ULT 32/64, W10PRO (NOT INSTALLED)
 
 

My 2. It may not be the solution you are looking for, but you might make a Task Scheduler - Time_Synchronization - in Windows to update the clock when you reboot or even at an interval you want. I don't know how to do this in Linux. I create one to update my clock every 4 hours.
My System SpecsSystem Spec
26 Sep 2017   #16
BLUE838

Windows 7 64 Home Premium
 
 

Quote   Quote: Originally Posted by mrjimphelps View Post
I have dual boot Linux / Windows. I discovered an anomaly between Linux and Windows: Whenever I would boot into Linux, then exit Linux and boot into Windows, the time shown in Windows would be five hours off! I found that the cause of this is that Linux uses UTC (Universal Coordinated Time or Greenwich Mean Time) and converts from there to local time, whereas Windows uses local time. Consequently, every time I would go from Linux to Windows, I would see UTC rather than my local time.


I fixed it by doing a registry edit in Windows:
  • I went into the Windows registry and navigated to here:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\TimeZoneInformation
  • I right-clicked in the right pane and selected New / DWORD (32-bit Value) -- "RealTimeIsUniversal" (without the quotes).
  • I double-clicked on RealTimeIsUniversal and changed the Value from 0 to 1.
I rebooted into Linux, and then rebooted into Windows. Problem solved!

After doing this, I discovered that the computer BIOS was showing time in UTC. But that's ok, because both Windows and Linux now show the correct local time.

There may be something you could do in Linux rather than in Windows to fix this; I did this fix in Windows.


Works! Sorry, im a bit late, i gave up and recently tried this and the clock works now. I can't believe it had something to do with Linux. I would of never figured this out, THANK YOU!
My System SpecsSystem Spec
26 Sep 2017   #17
ICIT2LOL

Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
 
 

No worries Blue and as with anything Linux and Windows dual boots - I find anyway - the machine can attain soem really quirky habits.
My System SpecsSystem Spec
27 Jul 2018   #18
qpod25

windows 7 ultimate 32 bits
 
 

i have the same problem.But its worse than yours.Not only clock but the date is also incorrect.several times,i corrected it manually.but it became incorrect again.How to fix it.
thx.
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27 Jul 2018   #19
Ranger4

Windows 7 Home Premium 64 bit sp1
 
 

qpod25. The most likely cause is a flat CMOS battery located on the motherboard. These are usually a 3 volt 2032 lithium button cell & readily available. The time & the date are stored in the computer's motherboard & this small battery provides power for that while the computer is shut down & when that battery goes flat the time & date are lost & have to be reset.

This website might help you on how to replace the battery.

How to Replace the CMOS in a Toshiba Satellite Laptop | Techwalla.com
My System SpecsSystem Spec
28 Jul 2018   #20
qpod25

windows 7 ultimate 32 bits
 
 

if this is hardware related issue then why another laptop of mine (Intel(R) Celerone CPU 540 @ 1.86GHz) Manufacturer Acer 32 bit is showing time differently.Also my laptops used to show time correctly.But only now,i dont know what has happened,that both of my laptops are not showing time correctly.One Laptop is online and other is offline.But both show the same symptoms.
i synced the clocks withe microsoft internet based servers,which became ok.But the next hour the time again was wrong.
best wishes.
My System SpecsSystem Spec
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 Time is always wrong




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