Mods not working (DLL issue?)

[Graegoir]

My KSP is running smoothly and all the mod parts are showing up. But some of the mods just don't work, like MechJeb and KerbalEngineer. Other mods like FuelTanksPlus work just fine. I figured out that it's the mods with DLL files that don't work, but I have no clue as to how I can fix this.

[RatchetinSpace]

Have you made sure the mods are installed correctly? Some mod makers can be tricky and put the GameData folder inside another folder or they simply expect you to put the folder into the GameData (I know that MechJeb has to be manually dragged into GameData). This confused me to until I saw the random folders around my GameData and outside my GameData, I felt like such a noob.

[helaeon]

Have you made sure that you aren't running KSP in a protected folder? I've heard of problems with Windows data protection in the Program Files folders on some install unless you do something specific to tell Windows that KSP is okay (that is of course if you're running windows). But, I don't remember what that is as I've never had that issue myself.

[Graegoir]

You, sir, are my hero. I remember now that I had installed the game in a different folder before my computer crashed. Moved the game out of the Program Files folder and everything is working perfectly