Flaccon, I have myriad old circuit boards, leds, plastic boxes and soldering gear in my garage. I can fashion a number of electronic boxes that will flash, whirr, beep and click in the presence of ghostly visitors, whether they are inside your computer or anywhere else you'd like me to pinpoint them. These boxes, I can assure you, will be deadly accurate in picking up spirit.
If you are willing to pay my travel, board and lodging and expenses, I will construct these devices and bring them to use at your location. You can film me in the use of them, and I have no doubt that you will be delighted with the beeping and whirring and flashing as they confirm your claims of spirits infesting your computers.
When do we start?
ETA - Oh, I could add some kind of meter to the boxes if you'd be impressed by a needle jiggling about on a box with flashing lights?