OK, well you definitely have something on your computer that you don't want! See if you can get to this page. http://www.safer-networking.org/minifiles.html you want the CoolWWWSearch.SmartSearch (v1/v2) MiniRemoval program. un zip it and run it, then run the cwshredder program again. If you can't get to them Try the Bazooka program. http://www.kephyr.com/spywarescanner/supportus.phtml Bazooka does not fix your problem, what it does is send you to a web page where you have instructions on how to manually fix the problem. Some times these programs block websites by using the HOSTS file. If you are using a version of windows below XP you should find it in your windows directory, in XP you should find it in the windows\system32\drivers\etc directory. Just rename it to HOSTOLD. Then restart your system. Your system will run fine with out it. Now see if you can get to the web sites. Also try http://www.windowsstartup.com/ it lists what programs are starting up on your computer. When you start it, it will list the programs, then hit the consualt button, and it will try to tell what the programs do. It may help find the program.
Start by hooking a telephone to the DSL line and dial the # 3. Listen closely for noise on the line. If you hear loud eggs being scrambled or a 60 cycle hum, that could be the problem.
Then unhook your DSL modem from the phone line and find the modem in Start/ right click on My Computer/ click on Properties/Hardware/Device Manager.
Find your DSL modem on the list and right click on it and then click Properties/Diagnostics/Query Modem.
If it turns our to be OK, call your ISP Tech Support. They would have a working knowledge of connection problems and the rest of us would be taking shots in the dark.
Don't add or remove anything until you have talked to Tech Support.