I first engaged John to clear a computer virus , which he did efficiently. I happened to mention i am super sensitive to EMFs and asked if he could do anything to clear the high wifi fields in my computer area and part of living room. I had tried electrician, building biologist, other computer techs, etc. I have ethernet. but no joy. He worked for 3 hours and cleared all so everything is working through the ethernet. No wifi . I subsequently asked him if the wifi fields re my tv and mobile phone could be cleared. All done. I'm forever grateful. My health has improved greatly. He also was able to set up a blog page for me. He's is affordable too. I am somewhat disabled, he is very cognisant of my needs and a great respectful, polite, quiet personality. My computer work is finished, but I'm now looking forward to piano.lessons. yes he's a musician.