I got this keyboard on Black Friday sales and it was good until around 1 hour ago first i thought my mouse had an issue as sometime left clicking would cause double click or right click the top option in the left click menu on chrome. then my keyboard would not type i forced restart my PC and it would not let me log in also the windows lock kept flashing as if i kept pressing it or something so i used a membrane keyboard i had lying around to log on to the HDD which i have password protected (k70 is still plugged in at this point) then on login screen it kept pressing enter so i disconnected it to log on i go on chrome and then re plug in k70 only to notice it is spamming the crap out of the -+/* and enter keys at this point i knew that the problem was definitely the numpad as those keys are close together around the numpad i disconnect the PC and open the CUE software to notice that the numpad 1 key is faintly shining green which i never set it to do so in the first place as no key on the numpad or to the right of the Y key has its own light but the rest of my custom lighting was working OK i quit the software and that did nothing (well the software was not even running during startup of windows) i posted this on corsair forums and have not recieved a reply there either