everytime i go in internet explorer, the start page is always this searchmachine "searchmyrequest". I already tried cwshredder and spybot, but i still always find it there. How can i remove it?

If you ran spybot is possible problem is fixed and homepage wasn`t reset,change via tools-internet options.If problem still exists get hijack this... http://download.com.com/3000-2144-10227352.html install and run it,you can manully remove intrusive problem with it.

There is an uninstaller available on their website if you want to try it or post a HiJackThis log. Uninstaller it's at the bottom of page CW-Shredder-Spybot-HJT

http://www.computercops.us/postt21614.html http://www.computing.net/security/wwwboard/forum/9935.html http://www.askmarvin.ca/forums/index.php?showtopic=912 all go into varying depths of effort/trouble to deal with this pest and others like it... And this one: http://www.computing.net/windowsme/wwwboard/forum/41787.html covers a range of references at computing.net; there is some duplication across them - sorry about that. But nonetheless have a browse and look out especially for input from: SVG/The Count/Mesich/KTTD/DAVEINCAPS all of whom seem well versed in dealing with a wide range of pests (to their credit)...