EXE file flagged as malicious by security vendors (Antivirus softwares)

We have Create a windows build then I used BoxedApp to pack the those files in single exe file.

After packed exe file I send to our customer and he did a virus test and found that file is malicious.
(Please see screenshot of problems)

We haven’t digitally sign exe file.
If I signed file digitally , it will flag as safe file ?
or I need to do anything else ?

Anyone used BoxedApp to pack Exe file ?
is there any other tool I can use to pack exe file ?

I know some of virus detection are false positive but we can’t explain this to our customers :slight_smile:

Please help.

Thanks in Advance.
Bhavin :slight_smile: