I was looking in my c drive and found the following: windows/appcompat/programs. there were 3 files in it. 2 xml documents called aeinv_previous and aeinv_wer (420e8ce1-9b25-4ada-b2f3-df4d21e65dd9)_20100618_195542. And then something called recent file cache which is a bcf file dated 5/29/14. This is written in either chinese or japanese. My question is it safe to leave in there or can I delete it all.