Random CEL

My car is retarded, anytime anything gets messed with on my car, CEL comes on. Like last night messed with power window, because I thought it was going to fall through. Light came on then 50mi or so it went away. Then sometimes it will just randomly come on and when it does, my idle it gets all whacky and feels and sounds like it wants to stall, then when light disappears everything is fine again. Any idea of what it is? I try to check at AutoZone, but every time I go light disappears then they think I’m fucking with them.