hang-the-9 :
First need full system specs. It takes 5 minutes to reboot the computer? Seems a bit slow for a gaming setup even with a standard drive. Anything happen with the system before the issue? Update for drivers or Windows? Something get installed or removed? Check temps in the system to make sure it's not overheating?
Here are some specs:
Processor: AMD Phenom(tm) 9600B Quad-Core Processor 2.30 GHz
Installed memory (RAM): 7.00 GB
System type: 64-bit Operating System, x64-based processor
GPU: AMD Radeon R7 200 Series
Storage: Seagate BarraCuda 1TB
Me and my dad built it, and we had a lot of bad luck. The ram, which we found out nearly a year later was causing the problem, was, paired with Windows Vista, causing crash after crash. We replaced almost every part and we couldn't find the issue. After we solved that, we got windows 10. Then, I got a brand new CPU for Christmas and wanted to install it, so we did. Well, tried. It turns out I needed better ram and couldn't install it. I was really unhappy, but later on I got a 1TB hard drive to pair with my measly 150GB drive which had a lot on it already.
My brother, on the other hand, had his run first try and had no problem installing components in his PC. Every part of his computer is better; the GPU, CPU, Motherboard, you name it.
I know it's not an application, and no, it's not overheating. Also, I estimated 5 minutes; I could be off by a lot. I'll time it next time. Thank you for replying.