1.Turn-off Windows Firewall error 30125-1007:

Firstly, it is advisable to TURN OFF all the security settings, including the Firewall and security software. Then, if you have an antivirus security software installed in your computer, then TURN OFF the same on a temporary basis.

2.Remove the Temp Files error 30125-1007:-

Go to path C:\Windows\Temp
Select all files and click on delete
Type %temp% in start menu search bar,
delete all files , you can skip files that are running in the background.
3.Perform the SFC Scan error 30125-1007:-

Click on the Start button
Type CMD
Right click and run as an ADMINISTRATOR
Type the command SFC /SCANNOW in the command window
and press <ENTER>
It will take some time to finish the scanning process , if it shows any errors in the results you need to do proper action suitable to the error.

4.Repair/Remove Existing Office Software error 30125-1007:-

If the Error 30125-1007 still persists, please do Repair to the existing or half installed Office package on your computer.

Then, proceed with the installation of Office 365 Suite or Office 2013 /2016/2019