Win7 system shutdown time is a long time common solutions

WIN7 has been used for a long time. I feel that the shutdown is too slow. I don't know what the reason is. Let's solve it -
1, start menu —>control panel—>power option—> enable advanced power management .
2, check the computer device manager to see if there are hardware devices with driver problems, if any, re-install the relevant drivers.
3, disk defragmentation. My computer ——Right-click on the drive —>property—>tool—> select the sorted disk to open “disk defragmenter"window—>analyze— > Defragmentation & mdash;> The system will start to organize, and the system will notify you when it is finished.
4, shut down all unused programs before shutting down, then shut down.
5, open 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 DLL files. 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 "NVIDIADriverHelperService 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 NVIDIADriverHelperService item in the pop-up window, select “Properties>, in the Launched drop-down list box , select “disabled”.
8, modify the registry switch machine: in [Start] & mdash; > [Run] & mdash; > type [Regedit] & mdash; > [HKEY_CURRENT_USER] & mdash; > [ControlPanel] & mdash; > [Desktop ], change the value data of the string value [HungAppTimeout] to [200], and change the value data of the string value [WaitToKillAppTimeout] to 1000. Also in [HKEY_LOCAL_MACHINE]—>[System]—> [CurrentControlSet ]—>[Control], change the value data of the string value [HungAppTimeout] to [200], and change the value data of the string value [WaitToKillServiceTimeout] to 1000.
9, if the above methods are invalid, I believe that still find a good system disk, reinstall windows7 system.