Yep i figured you had it lol. If you wanna try and reinstall your OS you can use the link i gave earlier to make a CD or USB stick and then follow this video on getting windows reinstalled and drivers reloaded:
https://www.youtube.com/watch?v=RxaVBsXEiok
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Its both, and yes its worth it. But again if you wanna try and reinstall your OS first i linked a fairly in depth video on how to do it, it also goes into the process of finding drivers and stuff. Up to you, but i would try it first.