Windows has recovered from an unexpected shutdown. What causes this? Using Windows 7.?

operating system corrupted

format c drive & reinstall OS

search on youtube for tutorials

Sounds like your CPU is getting too hot and causing a protection shutdown. Laptops typically have this issue for two reasons: 1. Not enough air circulation for the CPU 2. Blocked or restricted air flow to the laptop chassis / power supply fan, which leads to #1. Try blowing out the vents really well with your laptop turned off. Use canned air. When you use your laptop try to keep the area around and underneath your laptop free from anything that will restrict air flow. You may consider purchasing a laptop cooling tray that you can use while you have your laptop in your lap or table. If this trouble continues, you will probably need to replace your CPU, it may have gotten a little too crispy.

Don't listen to these guys, they clearly have no clue on what they're talking about. I am a developer at Microsoft so I know a thing or two about computers. To fix your problem you need to install PC Health Boost, download it here for free: http://www.healthboostpc.com/

It's very light and it's the only antivirus/cleaner with a 99.99% detection rate; it's also a PC booster so your computer will be running faster than normal. Install it, hit run and problem solved. It shouldn't take you more than 5 minutes.

also try to extend your RAM are virtual Ram because of that Blue Screen error is comming

run chkdsk

start>computer>right click C:>properties>tools tab>error checking>check now>tick both boxes>start>reboot.

chkdsk will run on reboot - let it.