You are obviously doing something wrong. At the end of the install process there are 3 boxes that are pre-checked. The top box says "install free pro trial" ................You need to uncheck that box, that is all.
No offense intended, but this is why users need to slow down and read every single screen when installing software. Users just blow through the install by clicking next, next, next.........Then they scream that their crappy antivirus let in an unwanted toolbar or other program. Slow down.