Do you have a laggy nexus 7? And even after installing new updates and doing factory resets is it still sluggish?
The solution is to install a different ROM. I recommend Cyanogenmod since it's a beefed up stock Android. And with the new Cyanogenmod installer, there is no need to root or unlock your device. It does everything for you. After everything is done, you will have a fresh OS installed on your device and you will notice a massive difference. (make sure to backup your personal files before you do this)
CyanogenMod | Android Community Operating System
The solution is to install a different ROM. I recommend Cyanogenmod since it's a beefed up stock Android. And with the new Cyanogenmod installer, there is no need to root or unlock your device. It does everything for you. After everything is done, you will have a fresh OS installed on your device and you will notice a massive difference. (make sure to backup your personal files before you do this)
CyanogenMod | Android Community Operating System