i have found that i had a adware installed on my Windows 8.1 PC that keep installing either Opera or Chrome, i managed to remove it so never mind that, but Chrome keep being installed every one hour of season (which means: for every hour that i use the PC), so what i want is to prevent Chrome to be installed on my PC forever, also preventing "our sponsors" from make a pack installing when i install a freeware.
to put simply: prevent Google Chrome being installed on this PC for it's lifespan