If you want a plug-and-play experience, buy a Logitech. But if you want to turn a $20 mouse into a 1000Hz, 8000 DPI sleeper hit, take the time to hunt down this software. Just remember to scan the .exe file with Windows Defender before running it.
Finding the official driver can be tricky as iMice is a budget brand often sold via third parties like AliExpress.