Is this Windows 7 SP1? Also what McAfee trial version - what software exactly were you testing?
You can stop your machine from immediately restarting when a BSOD (Blue (or black) screen of death) occurs which will give you a chance to read exactly what the BSOD is saying: https://community.mcafee.com/docs/DOC-1795
Did you try booting to Safe Mode and initiating System Restore to way before all this happened? System Restore is found under Start/All Programs/Accessories/System Tools or you can simply go to Start/Run and type in rstrui.exe and hit the Enter key or click OK.