slow post

For example, when I turn on the PC in the morning it takes a few seconds for it to post and the bios to load (I can see this because the fans are spinning at max speed and the case LEDs aren't on). After a few seconds (3-5) it posts, fans slowdown and the case lights turn on. If I turn the PC...

Hello, I have a unusual problem. First I noticed that POST is very slow, and then that large files opening is very slow. Tests showed that SSD was almost 10x slower than it should be, the hard drives 3-4 times slower and everything else quite normal. I thought the cause was some BIOS settings...