I cannot remove or upgrade LO

Every time I try, including safe mode, I get this message. I don’t know where the folder is that I should be targeting with the browse button.

The feature you are trying to use is on a
network resource that is unavailable.

Click OK to try again, or enter an alternate path to the folder containing the installation package
‘LibreOffice_5.3.1_Winx64.msi’ in the box below.

It means that you have not installed the program properly. You should uninstall and reinstall again. To uninstall, you will need to download exactly same version ( that was used for installation. Download it here. You may also consider installing a newer version (either from 5.3 branch, or from 5.4), which is also available there.

Thanks Mike