Explorer.exe is a malware computer virus designed to hide itself on the computer by resembling an Internet Explorer folder. The Explorer.exe folder needs to be removed from your computer as quickly as possible. If not, the virus file can wreak havoc on the system by damaging and corrupting important files in the Microsoft Windows system.
Click the "Start" button in the lower left corner of the desktop. From the pull-up menu click "Run." This loads a small search window with a single search bar.
Type "Regedit" (without the quotation marks). The command opens the Windows Registry editor.
Select the "HKEY_LOCAL_MACHINE" folder. A slew of other program files appears from this single file.
Open the folder "Software" followed by "Microsoft," then "Windows," "CurrentVersion," "Run," "IEXPLORER"="%System," and select "iexplorer.exe."
Press the "delete" button and you are asked if you are sure you want to remove the file. Click "OK."
Open file "HKEY_CURRENT_USER" followed by "Software" and delete the folder "mmtest."
Close out the registry editor and restart the computer.