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Windows 7: CMOS bad checksum error - defaults loaded... ?

31 Oct 2010   #11

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

Keep us posted.

There is nothing wrong with what you are doing (disconnecting all power for extended periods of time), but you need to keep in mind that while disconnected the CMOS chip is being powered by the CMOS battery, unlike a "normal" situation where it would be drawing from standby power. That only means that your CMOS battery will run down faster than other people's computers.

We're talking 2 to 3 years instead of 8 to 10 years here! So don't sweat it. Just check the battery in a couple of years.

My System SpecsSystem Spec
01 Nov 2010   #12

Microsoft Windows 7 Home Premium SP1 64-bit Build 7600 / Microsoft Windows XP Professional SP3

Yeah! I'm concius of that, my old battery lasted 3 years, so is pretty normal to me. Thanks for your advices

I'm now using my desktop, no prompts so far, I did all what you (Ryo, TVeblen) said during sunday and now monday it is operating properly.

Thanks a lot for all your help... I just have a lil' question to finish this... Why did this happen? because of the bad shutdown of the system? Is normal?

See ya!!!
My System SpecsSystem Spec
01 Nov 2010   #13


suddenly when not have good shutdown, or effect of the bad electric that's should be happen on the hardware. that's why people like to using UPS.
and battery BIOS is have voltage. default for the PC is 3V, least of the 3V that's should bad.
My System SpecsSystem Spec

02 Nov 2010   #14

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1

Quote   Quote: Originally Posted by FerchogtX View Post
Why did this happen? because of the bad shutdown of the system? Is normal?
Yep. Cutting power unexpectedly can do all kinds of nasty things to the OS, the BIOS, or even the hardware itself.

Is it normal? Well, running a power tool through your hand will cut it off - that's normal. But cutting your hand off with a power tool is NOT normal.
Having the BIOS corrupted by an unexpected shutdown is normal. Having an unexpected shutdown is NOT normal!

Glad you got it running!
My System SpecsSystem Spec

 CMOS bad checksum error - defaults loaded... ?

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