Can't open my optical wireless mouse to insert new batteries.

First thing is to insert a new battery.
Then follow these instructions:
How to Connect Microsoft Wireless Optical Mouse to Receiver 3 0 Techwalla...

https://support.microsoft.com/en-ca/help/321122/troubleshoot-a-wireless-mouse-that-does-not-function-correctly

https://support.microsoft.com/en-us/help/838398/troubleshoot-response-failures-in-wireless-keyboard-or-mouse

On mine, you have to lift the top back section up to reveal a compartment. Insert a thumbnail or letter opener at the point and lift up. It's right below where it says "Staples."

google the manual and read it.
first is missing parts, go them that are? the receiver missing or wrong one.
1: unbox it
2: put in fresh batteries, under top mouse lid off.
3: get in hand USB receiver. out of box. step1.
4: PC internet connected and windows running
5: insert receiver to PC usb port.
6 turn on mouse. switch bottom of mouse
7: push connect on blue button bottom of mouse.
end.
step is not optional if lost the matching perfect receiver in new box.

HP 2 4GHz Wireless Optical Black Mobile Mouse


A number of suggested solutions.

Observe to ascertain that is a wireless optic. usually wireless optic mouses require the adaptor section of be pluged to the computer to capture the signals. Also, mouse should light up soon after batteries were inserted in compartment. Power off the computer completely, repower on should capture the new settings.

on the bottom there is a small indentation which you can use your finger or thumb or small screwdriver to slide open revealing a space where the batteries are. Open and replace and close.

Please rate this answer. Thank you.

it's plug and play there's no drivers i know of except for vista [for obvious reasons]

If the mouse light is not turning ON even though you have new batteries and the mouse is turned on, then you need to contact the manufacturer for RMA.

Thank you!

If you know that the battery is good then try this next. There is a VERY tiny shark-fin shaped spring-loaded button on the bottom of the mouse that is pressed in, when you insert the receiver, while the mouse is not in use, that turns off the mouse to save the batteries. If you haven't used the mouse in a while, it can get stuck in the in position, so that when you pull out the receiver, it doesn't spring out and turn the mouse on (indicated by the red light on the bottom). If you notice that the light isn't coming on. Just try manually pushing in the little shark-fin thing a couple times to make it spring back out. After a couple times, you should be able to get it unstuck and the red light should come on.

After reading on Microsoft about replacing the batteries, down loading drivers and "press the button on the receiver and the connect button the receiver" - I got frustrated and almost gave it flight. Then my wife stepped in and realized that there was a green reset button on the USB connector as well. (who knew?) SO.... you press the green light (which is a button) and release it.... should blink. Then go to THE MOUSE portion and press the connect button for 5 seconds or so.... and wala...... One mouse that plays again! This ones gonna cost me! :) I hope this one works for ya!