Having to reformat your hard drive and reinstall a pirated version of windows XP because your computer can't stop loading porn websites and you're browser had 10 toolbars you can't remove. It's a right of passage to learn that. Honestly, the adware I got infected on the family PC just made me learn computers. And now I'm 10 years into a Software Engineering career.
Thanks adware. You kick started my career at the age of 12.