T5600 Sometimes stuck on Dell screen and usb issues

Hi all.

So i brought home from work a Dell Presion T5600.

It had a ramsome ware virus so work was getting rid of it.

I installed a new "dodgy" copy of windows.

Installed some more ram, just becasue i could. It had 32 installed already and i added 2 more 16 sticks so 64 in total.

so now it has the 4 sticks of the original 8gb and i added the 2 more 16gb. It has 2 cpu's so now each one had 2 sticks of 8 and 1 of the new 16gb

Got a Pci wifi card for it.

Worked perfectly for a while.

After a while it started not booting sometimes, getting stuck on the dell screen. Also sometimes i couldnt get into the Bios as the usb keyboard wouldnt work while booting, even though it lights up and shows power.

So i bought a new SSD and installed a new legit copy of windows.

Now it still sometimes dosnt boot, just gets stuck on the Dell screen, and also sometimes the keyboard wont work to get into the Bios.

I did the hardware test that you can do through the Dell website and all is good with the hardware.

Also i turned off the quick start option as i have seen this refered to.

I tried to take out the Raid controller and pluged the ssd into the motherboard but it looks like i dont have the driver for it. Though it works through the Riad controller.

Any ideas?