Am i supposed to be Concerned about this blue screen?

I have some questions
1.before about two months i've brought a new gaming computer with a
intel i5 proccecor
and gtx770 graphics card
and 8 GB RAM
and something really dumb comes up
when i play minecraft for over 2 hours+ and then exit it at once it gets a blue screen with crash dump
and as you can see its pretty good parts
m i supposed 2 be concerned?

2, the computer started to get a little slow compared to its parts it may be because of viruses/torjan?
if it does is there a good manual software that totaly erases computer from this stuff
i know a technichian who has a good setup thing on his disk on key that totaly scans all the computer its like a manualy system scan and it removes many viruses whic many antiviruses can't detect anybody knows such thing?

3, a friend told me its good if il split my hard disk into 2 partitions so that il have disk c for regular stuff
and disk d for games and stuff i download off the net
if il do so and target all my downloads to only one disk/partition if il get a virus/trojan on 1 partion will the other patition be affected?

4. On idle the computer usses of 25% of phsycal memory
with google chrome on it uses 40%
is that ok?
i might think its a torjan

Anibody?