Hi, Today I tried to install the latest (trial) version of ESET Smart Security 4.0.314, the x64 version. While installing, during the phase displayed as "Installing drivers", the screen turns black and after a few seconds I recieve a blue screen of death (BSOD), with the following error: "IRQL_NOT_LESS_OR_EQUAL". Upon restart ESET starts but complains about not being able to communicate with the firewall (or that it's not installed / not properly working). Although shortcuts for uninstallation etc. has been created in the start menu, these can't be started - they point to empty locations. After some manual cleaning, it won't let me reinstall and instead gives me "setup ended prematurely because of an error". Does anyone know what is causing this (probably the firewall driver?)? I would really like to know how this error could be fixed. Thanks. PS. My system is Windows Vista x64 SP1. EDIT: Screenshot #1: The blue screen of death, upon installing. Screenshot #2: The notification being display after reboot. Screenshot #3: The main screen of ESET after reboot. Screenshot #4: The empty "about"-dialog. SysInspector Logfile: http://www.mediafire.com/file/a1ihzzzyjj1/SysInspector-VB73G32H6LM28Q-090320-1530.zip These screenshots and the sysinspector logfile were taken on a virtual machine running (with the same configuration) on the affected computer, since I after this incident has reformatted my computer. Although, the errors and such are exactly the same.