Greetings, Recently installed NIS 2011 to Win 7 Ultimate 64bit. fully patched. Have had a number of BSOD. Some are caused by BHDrvx64.sys and others by IastorV.sys. Have checked mini dump files. See attachment Also found each time I receive notice of a threat attack (notification turned on) If I check to see the ip address of attacker invariably this sends the cpu into a state of frenzy and always results in a BSOD. Is there a fix for the BHDrvx64.sys problem? Cheers Rod