|Your question is bristling with information so much so that helpers won't know where to start.|
Forgive the sarcasm but in order to receive help you must provide helpers with as much information regarding your system as possible. Details about your PC (laptop, desktop etc.) what you have done to investigate, what you may have done to possibly create this problem. The green light is of no consequence... most computers have an LED of sorts in them... what is the light attached to?
More detail, detail, detail!