You may encounter the message below
Right-click the filename area
and then select "Keep"
BASIC7877ESetup.exe (Ver. 7.8.7.7 Nov. 26, 2025) (1,396,792 Bytes)
For Windows on Arm, use BASIC Generic Ver. 0.9
Note.
You may encounter the message below
Right-click the filename area
and then select "Keep"
When you encounter the screen as below, click "More info".
More trouble shooting here
Update
You can leave uninstalling former version to BASIC7877ESetup.exe.
Notice
If BASIC has been set up with SETUP.bat, run UNSETUP.bat before running BASIC7877ESetup.exe.