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Missing Operating System - Page 2

post #11 of 69
find the windows cd (if it's windows 7) boot it and use the recovery console to fix the mbr
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post #12 of 69
Umm, HELLO, experts, how is removing the battery going to reset his GPU CLOCKS???
The problem is not in the clocks- as the system crashed, your system files got corrupted.
To say again, your clocks are Default now, they are not the issue. As stated above, use the recovery CD. Best advice so far.

Do Not bother touching your mobo, removing anything from it or so.
Edited by ronnin426850 - 2/22/11 at 12:22am
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post #13 of 69
Quote:
Originally Posted by ronnin426850 View Post
Umm, HELLO, experts, how is removing the battery going to reset his GPU CLOCKS???
Why would GPU clocks cause 'Missing Operating System'.
post #14 of 69
Quote:
Originally Posted by LiFTed View Post
Why would GPU clocks cause 'Missing Operating System'.
My point too, read the edit And the OP

Quote:
I used ntune to overclock My 8500 GT memory clock and i set it too high and now when I boot up the system it says missing operating system
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post #15 of 69
If it's stating that the Operating System is missing, then it's most likely not even booting into Windows, rather stating the machine cannot find anything bootable on the HDD. Sounds like a nice reinstall time to me
post #16 of 69
I don't think overclocking the card too high caused the missing operating system. It just happened to occur right after he did that. I've overclocked my graphics cards with ntune way over and the computer would freeze, but it would never cause a missing operating system...
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post #17 of 69
it all depends on what the os is writing to at the time of the crash if it was updating it's boot files then it crashes it could fail to boot. I'd use your windows disc, try and repair windows, don't try and fix your MBR (master boot record) i very much doubt it's anything to do with that. if not then a clean install will work.
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post #18 of 69
Thread Starter 
Guys how the hell will i boot from the disc,it doesn't work anymore ever since i overclock the memory clock. And i set it way to high that my mobo doesn't support it.
post #19 of 69
When you use an application in Windows like ntune to OC your card, that OC is ONLY APPLIED when you are in Windows.

Given that the 'missing operating system' error only occurs very early in the booting process, before Windows starts (obviously) there is no way that your card is being OC'd at the point you are getting this error.

I agree w/ people above saying that what must've happened is that when your system crashed, it corrupted some files needed for booting purposes. It's also possible to get this kind of error from a virus/trojan program that's messed with your boot files (like the bcd file in particular).

Anyways, go into your bios, and adjust the boot device order so that the CD/DVD drive is the first thing in the boot order.

Then put in the Windows disc, boot from it (it takes awhile), and choose to let Windows Setup repair your Windows installation.

Once it's done, you have to go back into your bios and set the Hard Drive to be the first device to boot from.

If this doesn't fix it ... I highly advise getting an adult who knows what they're doing with computers involved ... you going to need somebody physically there to help you
Edited by brettjv - 2/22/11 at 5:50pm
    
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post #20 of 69
Thread Starter 
Quote:
Originally Posted by ronnin426850 View Post
Umm, HELLO, experts, how is removing the battery going to reset his GPU CLOCKS???
The problem is not in the clocks- as the system crashed, your system files got corrupted.
To say again, your clocks are Default now, they are not the issue. As stated above, use the recovery CD. Best advice so far.

Do Not bother touching your mobo, removing anything from it or so.
See, i first use Rivatuner to overclock my GPU and there was a message that says the driver of my gpu will reset the clock back to defaults during startup, and there was an option yes and no and i click yes which mean this feature is disabled, so I have to manually reset the clocks, will it work by clearing the cmos.
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