Uhh, well first off, did you build your computer right?
Building your own computer is easy. Building it takes 2-3 hours, and installing windows takes about 30mins to 45mins, and after that downloading and installing drivers takes another 30-45 mins. After all that, have it download windows updates at night, it may take a 2-4 passes to get them all.
Building a PC:
https://www.youtube.com/watch?v=VIF43-0mDk4
Installing Windows:
https://www.youtube.com/watch?v=4zAdwedmj1M
Protip for installing drivers safely, install them one at a time and restart the computer after each install to avoid breaking the OS, which can happen if you try to install them all at once.