Unhappy Unbrick lg l9 problem

So i stupidly installed chainfire 3d restarting my phone to a boot loop, i tried doing a hard reset still it restarted back to boot loop , I tried flashing a stock rom/kdz for my phone into lg support tool/r&d test tool, but every time i put it into s/w upgrade mode my pc dosent recognize it, it just says Usb device Not recognize , it also says device driver software was not successful , and i did
try installing my phone driver from here (LG P769 Support: Find Manuals & Warranty Info | LG USA) but yet it still dosent recognize it. I think this is the only problem thats blocking my way to unbrick my phone. I don't know if I'm installing the wrong driver or my phone.

If you know the right driver for my phone can you please reply with the link, I would be appreciated for your help.

my phone is also locked boot loader.

sorry for my bad english