you can change almost all the settings in the computer. you just cant clear codes, but you can scan for them. oh and with my version of the software, i cant go online with it. so i cant update to version 10, instead im stuck with 7. if my laptop goes online when the program is running, it will try to update, then it will cause some issues. so you have to remove and reinstall it. only works on 32 bit windows. i tried with 64bit and it doesnt read the cars computer correctly.