We sometimes enter the "regedit" command in the "Run" dialog box, there is no response, it is likely that the registry has been disabled access, it is likely that the computer poisoning! This problem may also be caused by the use of optimization software. The following small series for everyone to bring the Registry Editor there is no solution to the problem.
If the registry is blocked access, click the Start button in the lower-left corner of the screen and choose Run from the pop-up menu:
Enter "Gpedit.msc" in the text entry box in the pop-up Run dialog box, and click the OK button.
Open the Group Policy window. Expand User Configuration, manage templates, click System, and then locate and double-click Prevent access to the Registry Editing tool in the right window.
The Block access registry Editing Tool properties Pop-up dialog box is selected to select the Disabled single option.
Finally, click on the "OK" button to save the settings, exit the "Group Policy", you can unlock the registry. The next step is to access the registration form!