I am getting some memory_management BSODs sometimes when using your miner, I have two reaper miners, both set to automatically start when I run it. I'm not sure if this is reaper's fault or the guiminer's though.
I have had two things causing BSODs while mining with reaper/cgminer:
1) Memory on motherboard is bad.
2) GPU is bad or seated improperly in the board/riser.
I moved my 7970 to another slot and it seems to have fixed the problem. I'm not using that card with the scrypt guiminer though. So that couldn't have been what was causing it.