I bought my new unit just recently and it works fine for few days. Then something just happened, when I touched the casing of my computer it has a tingling effect similar to "grounded". I had a UPS though, I can't seem to justify what is the cause of it. Is it my electricity line or what. I didn't seem to know, or was it something else...

can you solicit your theories or facts of what's the cause of this situation?