I installed version 4.11 on July 5 and then downloaded 4.12 from the website and installed it. I have experienced three (3) 'blue screens' in approximately 1 hour when 'building all'. I am running Windows NT 4.00.1381 on Dell Dimension XPSR 450 x86 Family 6 Model 5 Stepping 2 AT/AT compatible 130,468 KB RAM What are your recommendations?