Unsure. I am unable to use any links on any websites and I cannot check my email (like in Yahoo

Question

I am unable to use any links on any websites and I cannot check my email (like in Yahoo & Hotmail). I called my ISP provider and they advised me to call the Norton Antivirus company and have it removed until the problem got resolved. After 3 hours on the phone, my laptop is still doing the same thing.