How to solve Windows Installer errors

Microsoft Windows Installer is actually the Windows program module used by Microsoft to run the MSI installer. It is a tool for managing and configuring software services.
Fault phenomenon: Prompt when installing the program: "You cannot access the Windows Installer service." Maybe you are running Windows in safe mode, or the Windows Installer is not installed correctly. Please contact your support staff for assistance. & rdquo; or & ldquo; can not access the Windows installer, the service in the Windows Installer state is stopped, can not start & rdquo; and other error messages.
Workaround: Use the command: msiexec /unregserver to uninstall the Windows Installer service
and use the command: msiexec /regserver to install the Windows Installer service.
If you still can't, try:
1. Check if there is any administrator rights.
2. Run Services.msc to check if the Windows Installer service is normal.
3. Download the latest Windows Installer (WindowsInstaller-KB893803-v2-x86.exe) installer and install it.
4. End the ikernel.exe process.
5. Delete the Windows Installer system installation directory Program Files\\Common Files\\InstallShield\\Engine.
6. In addition, you can try to use sfc/scannow to self-repair the system.