Short Answer 
To uninstall CrowdStrike, first stop all related services via Task Manager or Command Prompt. Next, use Command Prompt or PowerShell to run the uninstaller; if that fails, manually delete the installation folder and clean up the registry before rebooting the system.
Step 1: Stop CrowdStrike Services
Begin the uninstallation process by stopping all running CrowdStrike services. Access the Task Manager by pressing Ctrl + Shift + Esc and navigate to the “Services” tab. Look for any services associated with CrowdStrike and stop them. Alternatively, you can use the Command Prompt with administrative privileges to execute the net stop command for each service.
Step 2: Uninstall Using Command Prompt or PowerShell
Next, use either Command Prompt or PowerShell to initiate the uninstallation. For Command Prompt, open it with administrative rights, navigate to the installation directory (usually C:Program FilesCrowdStrike), and run uninstall.exe. If this fails, switch to PowerShell to run the command: Start-Process -FilePath “C:Program FilesCrowdStrikeuninstall.exe” -ArgumentList “/S” -Wait, modifying the path if necessary.
Step 3: Manual Removal and System Reboot
If the uninstall fails, you may need to remove the software manually. Navigate to the installation directory and delete the CrowdStrike folder. Additionally, use Registry Editor to cautiously remove any corresponding registry entries. Once complete, reboot your system to apply the changes and run a final check for any residual files or directories to delete.