My computer body giving shocks! UrgENT

When i power on my computer it give electric shocks on touching its body..I really don't know whats wrong I can only touch the front plastic area of course because thats insulator, but it gives shocks on touching metal body anywhere. Please help!

Power Down Immediately. Disconnect all power cords from their sources. Include disconnecting power from Monitor, Printer, USB devices, modem, router, etc. Now take a breath, and review what may have occurred directly before you started noticing the problem. Any changes made? Any work inside of the case? New location for equipment. Any "spills"? your own, or from others that you may not yet have noticed? New Carpet or furniture that may be generating static? New/different shoes or apparel that may generate static? Any new appliances in the building, and/or work on wiring, or known existence of faulty wiring? Any changes in the way you plug in your power sources or surge protectors. Ultimately you will do what your own judgment prompts you to do. But I'd recommend that you consult a local Tech and have a pro look over your equipment before continuing to use it. Best Regards

I really can't understand whats wrong…….I have placed this computer on a big wooden table and nothing seems to be wrong… let me consult a tech….Thanks for your courteous help

Doug's warning is extremely wise, this is an area where guess work does not belong, and could cause someone to die, the second such an issue arises without question remove the power (mains lead) ASAP, that said there are only 2 reasons for such an issue generally speaking, first there is a short in the system, what may have caused that is another issue, but a short is the end result, next is another short\bad earth, but not on the system, but on the mains supply, I know compared to the UK that wiring abroad can be very dodgy in comparison, so this is my biggest suspect, more so if the system had not been touched prior to this, but it does not mean it couldn't be the system, or even both as a result of a surge\spike. The main thing to be aware of with a system, is even with the mains lead removed there is still enough power within the PSU to kill someone if they touch the wrong thing, just like a TV, the tube on a TV holds something like a 50,000 volt charge with the mains lead removed, at least thats the figure I was taught when working in that field, US figure may differ due to the power difference, but it shows the dangers you can face even when the mains power is removed, hence Doug's advice to get a pro is so good. I know what I would do in this situation, but I was a builder and know what I am doing etc, but given the dangers involved the only advice is as Doug has given, get a pro, take the system to someone qualified to check it for a short etc, warn them of getting shocks from the system, this will tell them to use precautions when handling it, if they say it does not have a fault, and there are no shocks from it, then the problem is in your property, and you will need to get an electrician to check the property out ASAP because if the property is the cause, then it could only be a matter of time before the worst happens.