Click on Mouse in the System Preferences window. Click the Apple icon in the upper-left corner of your screen. Thank you for taking time to address this issue and help. I'm not a computer genius and my OS is in Finnish, so I'd ask that any troubleshooting help be explained like I'm five so that I can understand what to do. (Considering it cost me 120€ I should've returned it.)Īny help or troubleshooting is appreciated. At first I thought my mouse was simply incompatible with the new computer (I used to have Win7 before the upgrade) so I bought Razer Mamba as a replacement, but I find it has other issues the logitech mouse doesn't, that makes it uncomfortable to use and it's no better alternative. (As I said, I'd prefer not to perform clean install yet if possible, as I need the computer for work)Īm at my wits end here. The retailer from which I bought the computer from suggested clean install, and should that fail, then the problem might be physical, with the motherboard. I have tried removing the mouse from my devices, as well as the drives, and then reinstalling only for the problem to persist. Sometimes it might reset speed 5 seconds after I've "fixed it". The thing is, it IS plugged into USB 2.0 panel (In fact, I have tried every USB port on my motherboard (Z170 Pro Gaming) yet the problem persists. At other times, it gives me the message: "Logitech Gaming USB G3 (MX518) Optical Mouse is an old USB-device that might not work with USB 3.0" and then forward me to plug it into USB 2.0. 
In my " Devices and Printers" (translation, since my OS is in Finnish), on right clicking my mouse and using Windows Troubleshoot it sometimes gives the error " USB port stopped responding and recovered, fixed". This will restore the speed, until it randomly the next time resets back to slow speed. To restore the mouse speed I need to open Logitech Gaming Software and click the mouse pointer settings tab open. Unless I have set the Logitech Gaming Software to open on startup, the mouse DPI is the default slow speed on system reboot no matter what settings I try to change on windows mouse speed control. The problem is as follows: Mouse DPI keeps randomly resetting back to default (slow) speed, numerous times a day. I'm currently not in a position to want to try clean OS install, though eventually I might have to if the problem persists. The computer is relatively new (~3 months), though this problem has persisted since day 1.
(In addition I have Wacom WX 12 tablet plugged in) Mouse driver: Logitech gaming software (latest version) Mouse: Logitech Gaming USB G3 (MX518) Optical Mouse
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