Wow! I can't believe anyone is using version 3.9.3 - that was just a beta from 2 years ago!
If you still have the installer exe, run it and chose the Remove option.
If you don't, that can be a problem. Unfortunately I can't find any archive that still has that build. You will have to try removing it manually. Try these steps:
1 Clean the registry 1a. Press Win+R keys on your keyboard to bring up the Run dialog. Type: regedit and press Enter. Registry Editor will open. Go to
HKEY_CLASSES_ROOT\Installer\Products. Press Ctrl+F to bring up Find. Search for "Classic" and you will find the sub-key that belongs to Classic Shell. Rename the key (like add _ in front of the name). You can delete it, but renaming is safer so you can restore it if you mess things up.
1b. Next, go to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall and do the same - search for Classic, rename or delete the key
1c. Go to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run and delete the value named "Classic Start Menu"
2. Unregister DLLs 2a. Open an admin command prompt. Admin command prompt can be opened by typing: cmd at the Windows Start Menu/Start screen and right clicking and choosing Run as administrator. Another way to open admin command prompt is to press Ctrl+Shift+Enter after typing: cmd at the Start menu/screen.
Note: You can change directories at the command prompt by typing cd <path to directory> e.g. cd C:\Program Files will take you there.
2b. For 32-bit OS
Go to the
C:\Windows\System32 folder and type the command
regsvr32 /u StartMenuHelper32.dll Go to the
C:\Program Files\Classic Shell folder (by typing
cd C:\Program Files\Classic Shell) and then type:
regsvr32 /u ClassicExplorer32.dll regsvr32 /u ClassicIEDLL_32.dll 2c. For 64-bit OS Go to the
C:\Windows\System32 folder and type
regsvr32 /u StartMenuHelper64.dll Go to the
C:\Windows\SysWOW64 folder and type
regsvr32 /u StartMenuHelper32.dll Go to the
C:\Program Files\Classic Shell folder and type:
regsvr32 /u ClassicExplorer32.dll regsvr32 /u ClassicExplorer64.dll regsvr32 /u ClassicIEDLL_32.dll regsvr32 /u ClassicIEDLL_64.dll 3. Restart Windows. Wait 15 seconds. Make sure the Classic Shell start menu is not running. If it is, right-click on the start button and select Exit.
4. Delete the C:\Program Files\Classic Shell from Explorer. It will ask you for admin permissions. If you are unable to delete some DLL file, most likely it is still registered and in use. Repeat step #2.
5. From the C:\Windows\System32 folder delete StartMenuHelper32.dll (for 32-bit OS) or StartMenuHelper64.dll (for 64-bit OS). Again, if the DLL is in use you need to repeat step #2.
6. Install the latest version of Classic Shell from
http://www.classicshell.net 7. Uninstall Classic Shell and restart
This should clear all traces of Classic Shell from the system. You are free to install any other version of Classic Shell or continue without it.