Windows Error - Installer encountered an error: 0x80070422

Method 1:

I would suggest you to follow the steps and check.
To start the Windows Installer service in Windows 7 checks the steps below.
a) Click on start.
b) Type Services.msc in the start search bar and press enter.
c) Scroll down and Double-click on the service named "Windows Installer".
d) Check the value in the 'Startup type:' field.
e) If it's currently set to "Disabled", then this could cause the issue.
f) Change it by selecting "Manual" from the drop-down box.

Met:hod 2

Step 1: Make sure Volume Shadow Copy Service is set to automatic and started. To do this, follow these steps:
a) Click on Start-Run, type services.msc, the click on OK.
b) When the Services window loads, navigate to the “Volume Shadow Copy Service ", the double click on it to open it,
c) Make sure the "Startup Type" says "Automatic" and started. If it doesn't, use the drop down menu to change it.
d) If it already says: "Automatic", then click on the "Recovery" tab at the top, and change the "First Failure" line to "Restart the Service", then click on "apply", then OK.