|I can't be sure of what you are saying. Taken out usually means delete. |
I can't see how it could automatically do that. I guess there could be someone hacking into your system or someone trying to be smart and they goofed it up.
You need to read the owners manual first to see how they expect you to return it to oem state. It may be that you do need those files. It may be that you need to make cd's or dvd's now. It may tell you more about that d drive.
1/3 of highway deaths are caused by drunks. The rest are by people who can't drive any better than a drunk.