This is not a problem. This has been explained multiple times to you and is explained in the guide. READ it this time or be reported for spam. This thread is getting cluttered with people repeatedly asking/reporting the same problems that have been answered & explained. If you want blur in the alt-tab window, YOU must create a tool to do it. Aero Glass by BigMuscle does NOT do it. http://puu.sh/9L00L/8a926000cc.png I want to blur in the lower floor windows do not know exactly how I need to create a tool thanks