Looks like it was probably Snes9x GX. Those settings look like they would be from a SNES emulator. It was probably just a weird one time thing. I wouldn't worry too much about it. Are you sure that all the old stuff is gone? How much space does Windows say is used on the drive?
Actually, now that you mention it, Windows says the drive is mostly full as if the stuff is still there. If it is, how would I go about recovering it?
I'm running Chkdsk /r on the drive right now, and it seems to be painstakingly working on -something-. So I'll just wait and see.
EDIT: Nothing happened,
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Users\Lui>chkdsk D:
The type of the file system is FAT32.
Volume Serial Number is 15E6-111B
Windows is verifying files and folders...
File and folder verification is complete.
Windows has checked the file system and found no problems.
312,491,488 KB total disk space.
288 KB in 3 hidden files.
32 KB in 1 folders.
158,158,368 KB in 6,464 files.
5,312 KB in bad sectors.
154,327,456 KB are available.
32,768 bytes in each allocation unit.
9,765,359 total allocation units on disk.
4,822,733 allocation units available on disk.
C:\Users\Lui>/chkdsk D: /r
C:\Users\Lui>chkdsk D: /r
The type of the file system is FAT32.
Volume Serial Number is 15E6-111B
Windows is verifying files and folders...
File and folder verification is complete.
Windows is verifying free space...
Free space verification is complete.
Windows has checked the file system and found no problems.
312,491,488 KB total disk space.
288 KB in 3 hidden files.
32 KB in 1 folders.
158,158,368 KB in 6,464 files.
5,312 KB in bad sectors.
154,327,456 KB are available.
32,768 bytes in each allocation unit.
9,765,359 total allocation units on disk.
4,822,733 allocation units available on disk.