My Windows 7 Pro 32 bit limped after I installed the Samsung Upgrade assistant and Samsung USB drivers. It almost came to a halt, and I could hardly use my system, although diagnostics did not give any errors.
It was only whan I tried to uninstall the Samsung Upgrade Assistant and the USB drivers for my Samsung J3V , that My system complained about a stack that could not be removed ( stack from CSR harmony ) and that some items in Samsung upgrade assistant could not be reversed.
It still removed the Samsung drivers and upgrade assistant, but my system remained slow. Until I re-installed the CSR harmony software. Now all is good again ??
with my old galaxy s3, s5 & current note5, i've never had to install drivers with win7 pro/sp1!
after connecting the usb cable, it was done automatically with message, "ready to use".