problem solved (i hope)
I just wanted to inform u that my problem has been solved, apparantly when I ordered the pc i upgraded from 4 gb of ram to 8 gb of ram and the shop just added them in the dimm slots but didn't adjust the voltage. I found out because with 4 gb of ram the system performed fine. Googled a bit and adjusted a few setting in the Bios and now it runs ok. So no bad drivers or anything, just some bios settings. Thank u and hope this explenation can some ppl out with the same issues.