My computer won't start up, motherboard problem?

Earlier today I was browsing the internet when my computer suddenly froze. Since I couldn't even open the task manager I shut down my computer using the power button at the front of my computer. After that my computer would not get past the "windows loading screen". I wasn't doing anything to overburden my computer at the time it froze, except for the fact that it has been running for a few days straight. please help me.
 
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