Buy less-cheaper ones.
In all seriousness, maybe an interference issue?
Try not to connect them in the USB3.0 ports (if there's any and if that's where they are connected to).
Also on USB, make sure drivers are up to date.
On ASUS there's usually a ASUS Live Update utility (see the little icon next to the clock). Make sure all these updates are done aswell.
You can always manually search for newer versions of drivers and utilities.
Click 'Download', then on the new page 'Automatic Model Detection' - it will ask to install a small plugin, accept/install that then hit 'GO'
Confirm OS version then browse for the available drivers and utilities.
Note on the ATK package (if you must update it).
If you manually update ATK package, you MUST uninstall it (from Control Panel - Programs and Features) BEFORE installing the new version. Reinstalling OVER an existing ATK driver will not work.
--edit: don't go manually updating anything until you've check the already-installed Asus Live Update utility.
I'd suggest you go look for Win8 drivers for the mouse before starting to mess with the system. After all, cheap mouse are cheaper to fix (read: throw away) than wasting time trying to 'fix' the computer and ending up 'breaking' it.