Whenever I shut down my PC the End program - explorer.exe box appears stating the program is not responding - end now or cancel. I click on end now and the PC shuts down with no apparent problems. However if I forget - shut down and walk away - that box remains there until I return when I cannot shut down/switch off my PC at all and have to resort to pulling the plug out of the back. Any ideas/suggestions please. Until this is sorted I have begun to use Opera
Explorer.exe isn't refering to internet explorer but windows explorer, you could try the system file checker click here;en-us;310747 for a microsoft knowledge article on it. Run from the start menu run command.
Also you could try using the recovery console to see if theres any problems with your operating system.
Another fix may be to restore to b4 the problem started happening.