If you purchased a single-user license for an edition of QuickBooks, your license entitles you to install the software on a total of two computers, provided that you own both systems. These two installations enable you to work at your office on one system and continue your work at home on another computer.
When collections first show up on your credit report, you can expect your credit scores to drop anywhere from 50 to 100 points depending on how high your credit was to start. In general, the better your credit, the worse the hit will be. Over time, the collection account will affect your credit less and less.
Pay off collections accounts as well, but be aware that paying off collections accounts can, at first, cause your credit score to drop. That's because when you make a payment, the last activity on the account becomes more recent, making it weigh more negatively in your credit file.