Steam keeps freezes my PC when Downloading then it crashes.Please help me

[FreshPower]

Hi, yesterday i bought Rainbow Six Siege from G2A and added it to Steam.When installing it, it first appeared "Allocating Disk Space", it stopped at the half and my PC started to make weird noises maybe from Hard Disk.The Steam freezed itself and after a couple of seconds the PC aswell but i could move my corsair.After a minute or so my PC crashed.
My Specs:
i7-960 Default speed 3.2GHz to 3.4GHz
Alienware MoBo
12GB RAM DDR3 1336MHz
MSI GTX 1060 6GB
HardDisk of 1terrabite
525Watts PSU
It only crashes when I downlaod something from steam, when I am not downloading and just seeing games from Steam Store nothing happens.
Please Help me It's frustrating.

 

[FreshPower]

And Avast is the 3rd one with biggest b/s

 

[FreshPower]

Wait , I clicked Disk Activity the highest read is from Steam.exe with around 100,00 but there are multiple steam.exe there and the write is from System around 120.00 also multiple systems

 

[FreshPower]

A game finnaly finished update itself without any freezes
I will check if I can install my game

 

[FreshPower]

I can install a game but a tiny one, the disk usage is again at 100% ussage

 

[Jesse_20]

The highest value is at 4.000.000 from System and the second was Steam but now it dissapeared from it but still works

that is excessively high. If you look at the file location of that system entry, it reveals a culprit.

 

[FreshPower]

Hi again I resolved the problem, my HDD died and I got a new one and reinstalled windows.Now another problem came it is about when I restart my pc or boot my pc it appears that Bios did not detects my Keyboard and press F1 to continue, it works after I reconnect the mouse usb and keyboard usb back in the pc.How to solve that, please?

 

[Jesse_20]

You more than likely need to download the motherboard drivers for your system. These typically include usb drivers that will then operate properly when the computer starts, instead of when windows loads and installs a driver to handle it. It will also contain drivers for network and motherboard specific features that won't work otherwise. You can open device manager and look for yellow exclamation points in the list. More than likely, they will all be resolved by installing the MB driver pack.

 

[FreshPower]

I solved it I went into bios and disabled F1 errors and my keyboard works in windows and in bios aswell it's just a dumb error and I checked for drivers updates it's all up to date