computer virus alert, page-61

please help,since you turned off the ads yesterday my hotcopper was powering faster than ever,but since the ads are back on i cant even click over a page ,also what about this i use wireless at the same adress for 6 months now ,on hotcopper daily ok,but now all these probs happen in my room only on hc but allmy other websites work,i took my laptop around the corner and logged on to their provider ok,so why only in my room and only hotcopper site?
also doing this from an internet shop i sometimes use and notice i have to click the back button sometimes 2 times to get back and can see the add stuck,i have used this shop for 2 years and was always good,,whats happening and any advice thanks