None, but I was just playing battlefield 4 for like an hour and it randomly crashed on me and I had to do a hard reset. (BF4 runs great in 8.1 btw...the first time I really appreciated the OS)
I was getting random crashes in Watch Dogs that forced hard resets too, but I assumed it was just related to that game. This random BF4 test is worrying me. Maybe I'll just run BF4 for like 3 hours straight and watch some tv. If I get another crash, then I'll worry.
New rigs are awesome, but at the same time frustrating as shyt. I want everything to be perfect, but I guess that can never be the case