Windows Explorer keeps crashing!! help!!

hey guys im having a problem and i dont know how to fix it
so basically every time i try to go to my computer or try to open any folder thats on my desktop i get a message saying
windows explorer has stopped working. also when i try to attach a document the same thing happens.
i think it happened because i put a new theme and icons on my laptop, i removed both, but for some reason the icons stayed. i have no idea how to get rid of them. even with the whole theme gone tho, i still get that message. PLZZ HELP!!
i have windows 7 64bit