I will reach back to you once It happens again, thank you for your help really! In the meantime, I want to tell you something about LatencyMon, I get this weird spikes on DPC calls with the driver "ACPI.sys" with time 1000 ns (1ms) but I really need to wait for them to happen, in a way like the stutters, in an entire hour of testing nothing will happen, and a spike appear rarely (although It isn't a huge spike). Playing anything with LatencyMon running makes some stutter from time to time, I don't know if this is related tho, I never paid too much attention because I thought It was a tool to check audio stability.