Whilst doing some work, my mouse suddenly 'failed', cursor frozen nothing in mouse. After plugging in another mouse, I checked device manager and found that Win 10 had installed it as an Hid complaint mouse. So I went to logitech, downloaded smart installer (win 10), it would not work, refused to complete installation. Went back and selected x64 bit download and it worked perfectly. My logitech mouse now back to full functionality.