Are new batteries in mouse and keyboard.
I've recently bought a XTRIKE WINDDRAGON ME MK-901 KIT (wireless keyboard and mouse). It had worked perfectly for a while but recently these "phantom key presses" started happening. The keyboard and mouse work fine except when I'm gaming.
One thing I should note is that both the keyboard and mouse work on the same reciever.
Description of the problem :
While I'm playing games, the keyboard presses and holds down (random) keys. For example, I'm playing an FPS and it just randomly starts reloading, switches weapons, starts walking in a random direction (it walks until I press and release the key myself, then it stops), even as far as opening up the menu (Escape), taking screeenshots (F5) and opening lightshot (PrintScreen). Also, sometimes (rarer than keyboard inputs) the mouse stops working or even (very rarely) presses LMB.
I haven't had these problems before on my wired keyboard.
I am using Windows 7 x64.
I scan my system for viruses (Kaspersky) and malware (Malwarebytes) regularly.