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My girlfriend just sent me the following photo:

Over nine thousaaaaand

Apparently that was what greeted her, along with a load of license expiry warnings, when she booted her laptop this morning. She then rebooted to be told it was now 2001. I believe it then died, and it now won't boot. It's a 2009-ish white Macbook running Windows 7 Pro 64-bit.

I'm at work so I'm looking for any ideas as to what has gone horribly wrong before I try to troubleshoot it tonight. All help is greatly appreciated!

Update: Apparently it boots into OS X fine, but still has a system clock of 2001. I'm guessing the motherboard battery died, though I won't know until later.

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5  
that is beautiful, I have never seen it go into the future when the battery dies, usually it goes back to Dec 31st 1969 – madmaze May 9 '12 at 9:45
9  
Yep, definitely looks like a dead or dying CMOS battery. Get it replaced. – Indrek May 9 '12 at 9:57
1  
Looks like they're ~£15, so this is a job for the Apple store as the laptop is still (just) inside its warranty. Will update with an answer once it's fixed! – robotmay May 9 '12 at 10:49
4  
Crap, you have a time machine, don't fix it! – Moab May 9 '12 at 14:04
    
Something's strange -- though the symptoms do point to the CMOS battery, the CMOS battery should last 5 years or longer. – Daniel R Hicks May 9 '12 at 18:40

The CMOS battery on the motherboard is (nearly) depleted and must be replaced.

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