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Windows 7: OS reporting wrong time, faulty Mainboard?

08 Jun 2011   #11
Lee K

Windows 7 Ultimate 64 bit

As I stated above, the time in the bios has never been wrong! Never! So why replace a perfectly good battery? In many, many years I have never once seen a bad bios battery... never...

In my best conclusion from what I know about the problem, I think it is from system instability. I have had a lot of blue screens for awhile there, interspersed with periods of stability, the OS seems to be be resetting calendar and date to wrong time and ignores the perfectly good bios time, this occurs between the pings to the net server times, so the date is wrong till the next crash or time correction. Wish there was a option to sync to bios time and date rather than, simply an OS setting or relying on pings to time servers.

Having said all this I have recently come upon some other useful discoveries. Check my other posts. I believe I have finally maybe found the instability problems all lead back to a overheating video card. Which I thought was toast but it is not. See my other post on this.

My System SpecsSystem Spec
08 Jun 2011   #12
Microsoft MVP

Windows 7 Ultimate X64 SP1

Please a bit more civility will get you better help. I have seen a bad CMOS batt several times, they do run down since they are constantly connected, even with power on.
Also in Services see that Windows Time it set to Auto Start.
My System SpecsSystem Spec
08 Jun 2011   #13

Windows 7 Ultimate RTM (Technet)

I'm putting my money on the bet that you have the wrong time zone chosen in Windows. Windows keeps no time of its own. It reads from the BIOS on bootup and then at some point checks with a time server, but the time in Windows is displayed after adjusting for the time zone and Daylight Savings.

What you haven't told us is the error range. If the correct time in BIOS is say, 2 pm, what time does Windows report?
My System SpecsSystem Spec

09 Jun 2011   #14
Lee K

Windows 7 Ultimate 64 bit

"Years off, random dates from the past and even into the future." (taken from the second sentence from my original post).

Quite often in skimming the original post you can miss something important that was said, it happens to me too and once I am told, I usually apologize with, ahh, sorry I missed that from your original post...

Again I repeat this date issue seems to have gone away since my BSOD's have stopped, most all my BSOD's were due to overheating video card. Only reason why I brought this up is, I have never seen a time act like that, being so far off. If it was just like you said, a difference in time zone, a few minutes off, 1 minute added every day or something, I would know it is either a battery or time server issue. Also, the time in the bios has always been correct from the day I set it up a month and half ago. Only the OS time has reported incorrectly. Only other thing that might explain it, is perhaps malicious thing like virus or worm, or even hacker intrusion.

Please humor me, I was 2 days ahead of schedule till someone advised me it actually was Tuesday, not Thursday already. I didn't really realize I was that dependent on computer time.

I am not a software engineer, but if your OS time is set to the time server, and your OS gets the time from the bios, this sounds conflicting, or are you implying that the OS can adjust your bios time? Is this possible? You wouldn't think this is possible if you have your bios uncacheable. Also remember when they have had faulty processors that could not add correctly and such when they hit certain prime numbers, that was years ago but sometimes makes you wonder. Oh and I should mention I cleared my CMOS recently and it keeps the correct time after that, so the chip whether is is a numeric processor (I believe it used to be like that) or embedded is fairly independent.
My System SpecsSystem Spec
09 Jun 2011   #15
Microsoft MVP

Windows 7 Ultimate X64 SP1

Glad to hear you have it figured out Lee. More info is In This Post about how time synch works. I think the BIOS is running a separate clock otherwise you wouldn't have had this issue.
My System SpecsSystem Spec

 OS reporting wrong time, faulty Mainboard?

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