Restart your computer into Safe Mode if everything loads correctly, the problem may be rooted in a virus or other malware, and not a corrupt file. Next, check the location of your explorer.exe file. If the file is located anywhere other than "C:\Windows," your computer may be infected. If the problem is consistent no matter what you try and explorer.exe is in its correct place, the problem is likely rooted in the explorer.exe file itself, and can be repaired using system repair utilities.

I searched through the internet and tried all the troubleshooting steps mentioned on different website but that did not fix my problem but one real solution which is just two step registry key deletion made me happy which solved this issue.

Here is the step you need to perform to fix this.

1. Open your start menu, then type "regedit" to open the Registry Editor.

2. Navigate to the following key: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution.options".

3. If you see either "explorer.exe," "iexplorer.exe" or both listed under this key, delete them -- they should not be there. Close the editor, then restart your computer. Be sure to back up your registry before trying this step, and if any problems occur, access Registry Editor in safe mode and load your saved file. for detailed information on why this happen click on this link http://bookingtohosting..in/2015/01/explorerexedoesnotstart.html