Try these steps (these steps are not linked to each other)
1. In windows explorer, press the alt key once, a menu bar will appear. Go tools > folder options ... > view > check the box that says "always show icons, never thumbnails". Click OK. Try what you want to do again.
2. Copy the folder that contained the folder to a USB drive and move it to another computer (if other computer crashes as well, use one with Windows XP). If the copy operation crashes windows explorer, move it instead. Try what you want to do on the other computer.
3. Open a web browser (any modern web browser at all would do such as ff, ie, chrome etc..), then press control + O. Navigate to folder and try to do your operation from there. Post results.