My internet is very slow but computer's other functions are working fine. This is my work PC and I am the only one with this problem at work. I've used different software such as Esed Nod32, Ad-Aware, Esed Not32, Ad-Aware, SUPERAntiSpyware, Ccleaner and KVRT. Any detected file is deleted but my internet is still slow. I believe there is a file in my computer that virus software cannot detect. I might have received this virus or spyware from a picture I clicked on at sites like YouTube. How can I solve this problem?