Leaderboard

Hi, first post. I've been having pretty slow download speeds for the last two weeks on my iMac. I have Comcast internet and the official connection speed is supposed to be 1.5 MBs, but for the last two weeks it's been around 150 to 180 kbs. I have no idea why this is happening. I've called Comcast, they said the modem seems to be working fine (I have no router). I've scanned the computer for spyware, viruses, etc. I just did a download test on here and it accurately reflects the slow speed I'm getting right now (unlike speedtest.net or other sites). Any tips or suggestions? I have no idea what to do next. I'm going to call Comcast one more time and if they can't fix this I'm just going to have to get DSL.