It depends where you are staying. Assuming you have wifi capability on your computer you might be able to get it in your hotel room. Some hotels have wifi in their reception areas. Some town centres and shopping malls have it as well. You won`t have to do anything to your computer. If wifi is available you will be able to log onto it. If you check for unsecured signals you might be able to log on anyway. I`ve done that before ;-)
Bars, hotels, fast food outlets, cafes (internet and otherwise), shopping centres - there are lots of free wifi hotspots out there. You may have to buy a cup of coffee or a beer but that is no hardship.