it dislikes cs:go

weird problem tho, never seen anything like it lol

tl;dr

'i installed a logitech driver'

And?

I've been using Logitech mice for like 13 years, with their drivers, and it's worked fine (500, 510, 518 for 7 years, G400 and now G502). The 502 had a problem where it suddenly looked straight up or down while I was playing, but that was fixed with a firmware update.

Well i installed the Logitech driver because i bought the G303.. It is only in cs the problem occurs.. Also on the desktop and other programs

Wow dude. You reinstalled Windows from a fresh formatted drive and it still does it? Send the mouse back for replacement.

Don't ever touch mouse calibration again.

tried recalibrating it?

If you're still having trouble, try this. It's long but may help.

-Download LGS and place it in your desktop, helps for later
-Uninstall any current LGS
-Uninstall all traces of mouse drivers from device manager (mouse wont be usable after this)
-Unplug mouse and restart PC
-Re-plug in mouse to different usb port
-Windows will install a generic usb driver, remove this from device manager again (mouse wont be usable again)
-Install drivers (navigate to the install using arrow keys/tab key and enter)
-Restart pc again
-In LGS surface tuning, restore everything to default (should be a preset called factory default) and remove all custom tunings
-Finalize by switching report rate once, and keeping it at 500hz

The mouse has onboard memory, and reinstalling the drivers will just reload that memory. It should only be a matter of sticking the factory settings back. If this doesn't work the mouse is probably just defective.