So does mine (part of the
Wireless Comfort Desktop 5000 combo). Though I am not a hard core gamer, I have two widescreen monitors and I can whip the mouse back and forth between the monitors without any perceivable lag or jitters. And it works great for precise pixel by pixel editing of images too. And being a combo, both keyboard and mouse use the same receiver so only one port is used.
And just for a test, I just took my mouse and keyboard out of the room and from the other side of a wall, about 22 feet away, the receiver (which is on the back side of my metal computer case) was able to pickup my keystrokes and highlight a sentence with the mouse.
Hmmm, just noticed the specs say 1 AA alkaline battery required (included). Not true. The mouse takes 2 and so does the keyboard. But they were included - Duracell too and not some leaky off-the-wall brand.
I don't know who makes the mice and keyboards for Microsoft, but I have several different Microsoft mouse/keyboard sets and individual devices too and all work great and are definitely well made.
@amartin99 - did you try fresh batteries? I know you said the mouse was new, but if using batteries that came with the mouse, maybe they sat on a shelf for too long.
I just noticed this:
I don't have any AV here
as I understand it win 8.1 has built in protection so I didn't bother with security programs
:shock: To be sure, 8.1 includes the new Windows Defender and Windows firewall - and these are what I use on all my W8 systems (and MSE and WF on my W7 systems) and they are fully capable of protecting you from today's threats (in spite of what some folks, and competing product makers may tell you)
AS LONG AS you keep Windows updated and you avoid risky behavior like illegal filesharing via torrents or P2P sites, you don't visit illegal pornography and gambling sites, and you are not "click happy" on unsolicited downloads, attachments, and links. Of course, those are the same precautions you must take regardless your security software of choice.
That said, you should still periodically scan with a second scanner just to make sure your primary security software, or you, the user and always weakest link, didn't let something slip by. And for that, I recommend
Malwarebytes's Anti-Malware Free (MBAM). The free version is used as an "on-demand" scanner. But note unlike other scanners, MBAM Premium (which includes a "real-time" scanner) works well with other real-time scanners so you can run them both at the same time with no worries of conflicts or bogging down your system.