I am running windows 8.1 with mouse labeled (2), mouse labeled (1) was run using windows 7. Both mice disconnect randomly to the point that mouse (1) was replaced with mouse (2), using a different OS. I have tried going into device manager and finding every single bluetooth driver possible and unchecking the box that allows windows to disable the mouse (if the option is even given to do so). I have tried new batteries, and I have tried reinstalling all drivers possible. I am about to send the new mouse back and just get an RF mouse. I work with computers if you need to get more technical with your suggestions. I think it may be a hardware issue now. Thank you.
(1) http://www.amazon.com/gp/product/B005T4HT24?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
(2) http://www.amazon.com/gp/product/B00IUXAQ5I?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00
(1) http://www.amazon.com/gp/product/B005T4HT24?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00
(2) http://www.amazon.com/gp/product/B00IUXAQ5I?psc=1&redirect=true&ref_=oh_aui_detailpage_o03_s00