What is the reason why the shutdown becomes slow?

Some users complain that after installing the Win7 operating system, it takes a lot of effort to shut down. Sometimes it takes a long time of 5 minutes. How is this going to happen? How can I solve this distressing slow shutdown problem? Now ask the relevant professionals to solve this problem for everyone: 1. Start & mdash; > Control Panel & mdash; > Power Options & mdash; > Enable Advanced Power Management. 2. Check the computer device manager to see if there are any hardware devices with driver problems. If so, reinstall the related drivers. 3, disk defragmentation. My computer —— right click on the drive to defragment —>properties —>tools—>select the disk to open & ldquo;disk defragmenter“window—>analysis—>defragmentation&mdash ;> The system will start to organize, and the system will notify you when it is finished. 4. Turn off all unused programs before shutting down, then shut down. 5, open the optimization master & mdash;> system performance optimization & mdash;> disk cache optimization & mdash;> remove “ WIN shutdown automatically clean up the page file & rdquo; front of the tick. 6, do not load the DLL file. In [Start]—>[Run]—> type [Regedit]- HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsCurrentVersionExplorer to create a double-byte value called AlwaysUnloadDLL with a value of 1. If you want to remove this optimization, just set the key to 0. 7, disable the "NVIDIA Driver Helper Service", the service is generally not needed, and it will take up a lot of system resources. To close it, open “Control Panel—>Administrative Tools—>Services", find and right-click the NVIDIA Driver Helper Service item in the pop-up window, select “Properties>, in the Launched drop-down list box Medium, select “disabled”. 8, modify the registry switch machine: in [Start] & mdash;> [Run] & mdash;> type [Regedit]—>[HKEY_CURRENT_USER]—> [ControlPanel]—>[Desktop], the string value [HungAppTimeout Change the value data to [200], change the value data of the string value [WaitToKillAppTimeout] to 1000. Also in [HKEY_LOCAL_MACHINE]—>[System]—> [CurrentControlSet]—>[Control], the characters The value data of the string value [HungAppTimeout] is changed to [200], and the value data of the string value [WaitToKillServiceTimeout] is changed to 1000. 9. If the above methods are invalid, the author believes that it is still necessary to find a good system disk and reinstall the system.