slow internet??

[the_kid_a]

can anyone explain to me why my internet has been working reaaaaaaaaaally slowly since i restarted my computer with windows professional?? especially on msn, whenever people send me or i send them files it is reaaaaaaaaally slow, plus the webcam keeps crashing on it. can someone tell me what to do about it? i have used updated scans for virus' and spyware using Trend Micro PC Cillin Internet Security 2006 but it does not tell me that anythings wrong. i have also deleted my temporary internet files and cookies on the internet options menu window.

[RATTER15]

A thorough check for viruses etc is the first thing to do!!