Not able to uninstall the Net Extender client
09/28/2023 
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Description
Can't Install/Uninstall Net Extender Client due to "Register/folder/adapter/services issue" Error on Windows based host.
Cause
To remove a program in Windows, we uninstall it from control panel but many times the default uninstallation utility provided by the program doesn't remove the program completely. It lefts some entries in Windows Registry, some files in various folders in your hard disk drives.
These leftovers might slow down your system and there is no point to keep them in your system.There are many 3rd party software like Revo uninstaller, etc are available on Internet which claim to completely uninstall a software program in Windows but sometimes these software also fail to completely uninstall a software from your system.
Resolution
- Uninstall Using Control Panel
If this does not work, then we can try few things listed below:
- Delete remaining files and folders of the program and the adapter.
Adapters (Under Device Manager)
- Remove Software Keys from Windows Registry:
Now go to following keys one by one:
HKEY_CURRENT_USER\ Software\ SonicWall\ SSL-VPN NetExtender
HKEY_LOCAL_MACHINE\ Software\ SonicWall\ SSL-VPN NetExtender
HKEY_USERS\.DEFAULT\ “Look for anything related to that SSLVPN Software”.
HKEY_LOCAL_MACHINE\ Wow6432Node\ “Look for anything related to that SSLVPN Software”. - Empty Temp Folder
After trying the above steps, Please reboot the Workstation.
TIP: You can also try this Fixit troubleshooter (By Microsoft) - Automatically repair issues including corrupted registry keys that block you from installing or removing programs: - https://support.microsoft.com/en-us/help/17588/fix-problems-that-block-programs-from-being-installed-or-removed.
If the NetExtender Service is still showing up in the Microsoft Services Panel
- Open a command prompt by going to Start Menu | Run. Type cmd, and hit Enter.
- Type the following command to remove the service: sc delete SonicWall_NetExtender.
NOTE: Run the command prompt (cmd) as Administrator.
- Refresh the Services list. The service should have disappeared. Then try to install the Software again, you shoud be able to install the software
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