Default [Q]tablet wont install anything sys del

I been a fan of this great site for many years. I always find my answers here thanks.

my Craig cmp741e tablet wont install NO apps, and keyboard isn't present, keeps saying, i think i deleted all system files, when i was playing w/ apps like pimp my rom and Andromizer.( My internet connection sucked tethering frm my android hotspot.)

How can i reset/recover/update this thing. sure i know how to reinstall computers and all but this is new to me..
no idea what im doing. help?