Why is my internet slow all of a sudden?

I was away from home for 8 days and when i came back on this laptop only its like my internet turned very bad. After every youtube video i watch i have to disconnect and reconnect to the internet to browse for more, it takes me like 2 minutes just to go to a website and i can't stay on a minecraft server for more than a minute, some i can't even connect to. I obviously haven't downloaded or even turned on my laptop since i came back and i did an avg full system scan and had no threats. Any ideas?

Ok, first off, not be rude, but why would you do a full scan with AVG, and expect to have at least ONE threat? Scans with Malwarebytes. Your system sounds infected, or follow these steps: 1. I'm assuming you are running Windows. 2. Go to the start button. 3. Control Panel 4. Uninstall a program 5. Uninstall any programs you didn't install. Lots of them are pop-ups that slow your internet down, and some are browser hijackers. Here is a link to Malwarebytes: http://www.malwarebytes.org

Might need to upgrade your broadband package.