+ 0 Votes what i found kal_lmn 6 years ago For Matcbury, you said that you have spysweeper, and thats exactly what is slowing down the internet. It starts automatically on startup, so wait until its done loading, then shut down spysweeper. I had the same exact problem, and everytime i shutdown spysweeper, my internet worked fine. Spysweeper is a great scanner, but i dont suggest lweaving it on while on the internet. For leafgreen, sorry, i dont know what to say, try shutting down all antivirus/antispyware before(shutdown, not end process), or scanning for a virus/spyware that may slow the computer.