Hello Kasuz,
Sorry to hear about the mouse issue.
There are no drivers to download for a mouse. Any driver needed is installed from the wireless dongle when first plugged in.
Can you try the mouse in a different computer to test with? If it works in a different computer, then the problem is in the first computer.
Two things to try:
1. After you turn the power button on under the mouse, does holding down the Connect button for 3 seconds not do anything?
If not, go to the Device Manager (Start>Control Panel>Device Manager) and look under Mice and other pointing devices to see if there is a caution sign next to the mouse installed.
Also drop down the arrow for Unversal Serial Bus controllers and see if there are any caution signs next to USB Composite Device.
If you do find caution signs on either, right click on them and choose uninstall.
Unplug the Dongle for the mouse. Wait a few seconds and replug the device into a different usb port.
2. Hold down both right and left mouse click buttons at the same time until the light on the top blinks one time. This is how to change the DPI speed. Blink once for high speed, blink twice for slow and blink three times for mid speed.
It may be stuck for some reason and changing DPI will activate it again.
If the mouse is still not working, you will want to replace it as it has something else defective with it.