Hello everyone! First time user and I have SO many problems it's not even funny. I have a very old HP Pavillion DV4-1428 that I was somehow able to get windows 10 on (I think I love 10.) The current problem is I tend to mess with things even though I have no idea what I'm doing. My computer started freezing and I started messing around and now it says an app needs the following windows feature: NTVDM. I've read a lot of the other posts regarding this, but they are all older and talk about DOS and 16 bit etc. and I am completely computer illiterate. Thanks in advance!