It would be interesting to see if there is anything in common with all of the complaints of this freezing like using third party software along with Smart SDR. There must be some kind of weird corruption going on somewhere but some seem to remain immune. Hope they find it.
The (free) program to show system IR latency was showing less than 500 u-sec IRQ response time. Never saw it go above 1 m-Sec.
System: 6500 / Windows 7 / direct independent 1GHz Ethernet connection.