This morning when I opened Quicken, my main checking account opening account balance was negative and I was certain I had a positive balance. This account has been in quicken for over 20 years. There had been no new transaction for a few days, and I had a positive balance the last time I looked. A friend had a similar problem with a credit card account in quicken just a couple of days ago. I helped her figure out what was wrong and found the opening balance was changed. It took us a while to figure out it was the opening balance as we started looking at month by month recent reconciliations as I thought a cleared transaction might have been deleted. But today, since I saw her problem, I loaded a backup quicken file to temp location and opened it, sure enough the opening balance was different. Changed the open balance back and now have correct current balance in my account. I wanted to bring awareness that this is happening in case you face similar problem. Quicken support is closed today so will have to report it to them tomorrow.