Getting more frequent V5 lockups near end of MP2 renders of 90 sec. segments. These normally take about 45 minutes. "Time Remaining" shows zero, but percent stops at 90 - 97%, while elapsed time continues to run (for many hours). No error message. Select "cancel render" and program locks, requiring a Task Manager escape. Check for the rendered file and find it has either partially or completely rendered. These segments have rendered 20 or 30 times previously without problems (changes are made to timing and sequencing in iterations. Plenty of drive space, and no other major programs runnig on 3 Ghz Pentium.