Viruses on your computer can be a massive pain to deal with. It may not stop you from being able to actually get your work done, but pop-ups are bothersome. Even if you're not dealing with pop-ups, but your computer is getting slower and slower, we should be able to fix that up with either virus removal or a fresh reinstall. Either way, bring your iMac by the shop and we'll take a good look at it, and be able to give you a quote if you'd like. Leave it with us and we'll have it back to you as soon as we can!