I tried to find that error.log but I only have info.log in that folder. Anyways this error would pop up right at the end of the installation. it has to do with something about the engine not starting. then when I boot up my server computer everytime I get this hardware could not start please check in device mananger to see what hardware couldn't start. When I check in device manager I see in the Other devices tab there is a CTRL, Disabled, and WSS/SB that has an explanation mark next to them. When I uninstall avast these devices disappear. I'm running on an older server with Windows 2003 installed. It is a pentuim 2 400 mhz with 384 ram but this is the only program that is installed on this computer. Just a test server so maybe if I install it on our newer server I won't have any problems. I just wanted to test out the program before I shut down my users for about a half a day. hopefully this info will help you out some more