Hi jcgriff2,
thanks for your reply.
As I mentioned in the first post, I already checked my RAM sticks with Memtest, no errors. I'll however let the tool run for 10 passes this time around, I think this should most likely rule out any errors. Meanwhile I swapped my RAM stick setup to A1/B1 from A2/B2, maybe one of the slots is faulty.
I'll also run the HDD Diagnostics afterwards and report back.