Nerumph :
So let me clarify the issue: your experiencing issues like the mouse will jump across the screen, like FPS lag? Or is it more like the mouse is out of batteries and is only occasionally working?
If it is the first, I would suggest opening up the task manager and looking under the performance window. Is your CPU being over-taxed by anything?
On a more simpler note, try blowing out the crevice where the laser or optical reader tracks your movements. Hair and dust may be interrupting the tracking process and causing the havoc. If you're not using a mouse pad, also, I would highly suggest it.
If your wireless USB receiver is on the back of the PC, try moving it to a front panel USB header if you have it, or, at least, try a different port. Also try bringing the mouse closer to your PC to see if it is a signal degradation issue.
Finally, I would suggest double checking your mouse settings. Go under the Control Panel > Hardware and Sound > Mouse. Under the pointer options tab, ensure the speed is on the 6th setting from the left. Click apply and ok and see if that resolves the issue.
If none of these work, report back and we can try disabling mouse acceleration for you.
Thanks for the answer!
Well, it's more of like the mouse gets out of batteries, and it's working only for like 20 seconds when i turn on the pc. After the 20 seconds it just goes really, really, really slow. Like 1 pixel per second or something...
The CPU is not under a lot of stress, that's not the problem.
It's also not the dust or hair or anything. It's absolutely clean there, and i bought this mouse like a month ago, because i thought the last one was broken. But it's weird that the mouse was going all this month pretty fine, with a few occasional slow ups, but now it's like that all the time.
It's a laptop so there are usb ports only in the front. Tried the mouse on every single one including USB 3.0 ones. Doesn't help with either. And even when I put the mouse right next to the signal receiver it still doesn't work, so it's not about signal I guess.
The pointer speed doesn't change anything. The first 20 seconds it's still ok, as usual, and then slows down to ultra slow.
Maybe it could be the mouse acceleration! Because it feels like that a bit. The mouse is fast and then goes slower. And when I lift up the mouse and put it down again, it's fast again, and in few seconds it's ultra slow again. Just have to find out how to disable that acceleration..
P.S i looked at the task managers CPU performance again. At those 20 seconds when the mouse still works fine, the CPU goes to like 15% load, and when the mouse starts going slowly it goes down to 0-1% again. But I suppose that's not the problem, right? It's just normal to have some CPU load when moving mouse right?
EDIT:
Meh, just did this tutorial
http://www.tomshardware.co.uk/faq/id-1953585/completely-turn-mouse-acceleration-windows.html to disable mouse acceleration. Didn't help at all.
ANOTHER EDIT:
Ok, messed around with the mouse for some more today. Did all kinds of 'fixes' I could find in google, but nothing helped. Then I decided to try new batteries again.. and weird - it's working all good now. Guess it was just the batteries. BUT I still don't understand how can Duracell batteries last only for a month in a mouse? 0.o This is the 4th battery now that im changing in 3-4months time. How is that possible? 0.o