Couple of days ago my internet connection started to be really slow, not only when I'm surfing but especially when I'm downloading files/applications.
For example I used to download a lot from www.download.com and the speed would usually go from 300 - 600 kB/s, now it's like 60-90 kB/s.
I called my internet company they told me that the modem is fine and there was nothing wrong with it, but they did came and checked my lines in the apartment and that loooked fine too.
I tried almost everything... frome Tune Up 2006, to cleaning my cache/history and stuff, disabling my antivirus/firewall, system restore, etc, etc.
So I came here and ran a test, and this is what i got : (

::::::::::.. Download Stats ..::::::::::
Download Connection is:: 2026 Kbps about 2.03 Mbps (tested with 2992 kB)
Download Speed is:: 247 kB/s
Tested From:: http://testmy.net/ (Server 2)
Test Time:: 2006/08/10 - 11:05am
Bottom Line:: 35X faster than 56K 1MB Download in 4.15 sec
Tested from a 2992 kB file and took 12.094 seconds to complete
Download Diagnosis:: May need help : running at only 37.48 % of your hosts average (Comcast.net)
D-Validation Link:: http://testmy.net/stats/id-0XMG8SUTB
User Agent:: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 3.1)

Hello dlewis.
Yes, I've run couple of 'em actually including spybot/doctor/adware/counterspy, and i was clean of spywares.
I'm really out of the solutions...

Welcome to the forum TiToSlavia   
Have you tried cleaning in safe mode?
Have you restarted the modem?
And don't tweak your connection with cable-nut until you get those speeds up first!