What to do if you misuse Group Policy to prevent programs from running?

Group Policy is known to play a strong role in Group Policy, and sometimes inadvertently modify some of the settings can lead to unpredictable consequences, a chance to modify the Group Policy of only running a licensed Windows application, because just test his function, not to consider too much, Casually in the display of the running list of programs filled out from the filename, forget to add the suffix name. So you run any other program will be prompted to be banned, even if the exe file has no suffix name, instead of that also die, and now engaged in any program can not run.
After the n test, found that the import registry and so on other not, because other programs simply can not run, even Notepad can not open, let alone edit the program, it is necessary to reload the system. There's no way. In the restart try to have a miracle, but found that the computer miracle is not possible, check the previous computer magazine, Thinking of a previous article about Explorer.exe articles, Windows shell replacement problem, in the heart of Ecstasy, think it is possible to succeed, run Task Manager, end the Explorer.exe process, in the new task into the Windows directory, ready to change the name, the Explorer.exe Change to another name, Changed a few seconds later found that there is a Explorer.exe file, found that the system can be detected without Explorer.exe file, and automatically recovered, know this situation, immediately delete this Explorer.exe file, Regedit.exe changed to Explorer.exe file ( Move quickly, or the system will restore the Explorer file again, and then task Manager log Off, and then found the lovely registry interface out, this time did not run Explorer.exe files. Find the Hkey_current_user/software/microsoft/windows/currentversion/policies/explorer option in the registry, and change the value of the Restrictrun on the right to 0. It's good to log off again, of course, to the Explorer.exe file to change back.
After this discovery, shell replacements can solve some of the problems with the registry being disabled. This method can be used to solve the problem when importing a registry file that does not work.