Can someone explain what "dirty electricity" is exactly? I'm off to Walmart today and see about getting this: http://www.walmart.com/catalog/product.gsp?product_id=3371537 that was talked about in another post a long time ago. But if I have dirty electricity - would this help? I'm not really aware of surges or brownouts here. Lights don't flicker or dim. But if they are very, very slight they could still be affecting my computer. I'm still getting static or zapping from my emac, every so often. And yes, I will take it into the shop if need be. But I keep thinking -- could this be from the electricity. Nothing else seems to be effected - TV etc.