User Account Control can be easily tweaked and much flexible in windows 7 as compared to vista, UAC in windows provides more clear levels which will tell you exactly what options you are setting on different moderate levels of windows 7
Open Start Menu search and type UAC and click Change User Account Control Settings
Set the UAC level to third moderate level from the top [ as shown in the image below ]
I hope you like this simple straight forward trick, this trick is the best if you want to use UAC with less annoyance and without no dim desktop effect, you can read some more windows seven hacks we have written here. If you have any other question related to windows 7 please post it under comments at the end of this post.