xCHEREPx

From click to ready I can get KSP og loaded in about 90 sec, however, when I am exiting it can take as long as 5 - 6 min to get to desktop. during the 5-6 min I can hear the HD working hard and the cooling fan ramps up in the last 2 min until exit. can anyone enlighten me as to the workings on the back end to maybe figure out what is making the system struggle to exit? note: this problem can be completely avoided by just using alt+f4........it so far hasn't caused any problems.