Hello Feanux, and welcome to Seven Forums.
If you have installed a program that added anything, or you have, to the context menu recently, then you can use the program ShellExView
to disable that "Context Menu" item unde the "Type" column in the program to see if that may be it.
If you are not sure, then you can try a System Restore
using a restore point dated before this happened to see if it can fix it for you.
Hope this helps,