How to solve the slow shutdown speed of Win7 system

We know that Win7 is optimized in many aspects compared to XP system, and it is more and more convenient for our work and entertainment life. However, many netizens will find that after using Win7 computer for a period of time, the shutdown speed is slower and slower. What should I do? What?
1, Start & mdash; > Control Panel & mdash; > Power Options —> 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 "NVIDIA Driver Helper Service, this 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 dropdown In the 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, re-install the system.