I think we are drifting off topic a bit, but I will tell you about RFI to computers in my situation. I only run 100 watts on 160 through 10 meters but have had no trouble with my transmitter getting into my computer. Over the last 2 decades or so I have used several laptops and several different desktop computers. But the most important fact, I think, is that my antennas for 40-10 meters are on top of a 60 foot tower about 60 feet from my shack. They are all balanced antennas with proper baluns. Most devices are connected to my computer via bluetooth or WI-FI, with no long ethernet cables. If you use end fed or OCF antennas there could be more RF in the shack. On 80 and 160 meters various antennas are somewhat closer, but perhaps I am still lucky. I have no idea what would happen if I ran an amp. If your antennas are closer to your computer, this could be part of your problem.
Good Luck, Rick KL7CW