We have observed that some of the laptops takes more than 5 minutes to close all the applications and shutdown. To reduce this process time follow the instructions below:
1. Click on Start button, select Run, type Regedit and press Enter.
2. Expand: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control
3. Edit the value data of Wait to kill service timeout to 1500
This will improve the performance of Shutdown!!