Why I can’t shutdown my PC?

Did you experience a hang when the computer attempts to shut down? Seems it is weird you get this unknown error! Even you press Ctrl+Alt+Del hot key, it doesn’t work! Nothing you can do besides forcibly turn off the power.
You computer many not shutdown due to many reasons. In the article, we focus on some main causes, hope it can help you solve the problem.
1. The biggest possibility is your computer get a corrupt driver. Any software or hardware need a driver to connect it to your computer. If the driver are unfortunately get damage, you may face may registry problem including blue screen, PC freeze, computer not shutdown problem.
You many get a damage driver because you install a incompatible driver or some DLL file get missing. Also hardware conflict can cause this error.
Other possibilities is malware corrupts or deletes system files! How can we remove incompatible, corrupt driver by cleaning our registry. ErrorFix is the leader of registry clean tool which help you fix your corrupt registry!
2. Temporary files.
Usually temporary files record your web behavior, it stores in temporary Internet files folder for quick viewing. Temporary files block your computer causing serious computer problems. To delete temporary files, you can manually remove it or use a PC cleaner.
Method:
Go to Control Panel from start, and then choose Internet options.
On the General tab, click delete files button.
In the Delete Files dialog box, click to select the Delete all off-line content check box , and then click OK.
3. We also think that a malware can be the reason of computer can’t shutdown. As we know, malware can modify the computer parameters. Those malicious behaviors slow your computer, corrupt Windows system and give you more troubles. The best solution is to run an anti-virus such like kaspersky periodically.
4. Hard disk full, has errors or needs running defragment.
5. Some programs still running in the background, so you can not shutdown your PC. Just run manager task to disable those process.