Pick a Program Issue If the program crashes or stops operating, performs poorly, is difficult to launch, or displays Error 6123. Starting with Quick Fix my Program is what we advise. You can use this area to troubleshoot common PDF and printing issues as well. Tap Installation Issues if you run into trouble installing or uninstalling QuickBooks Desktop. You also can resolve 3371 issues. Hit Advanced Tools to utilize common Windows keyboard shortcuts to assist in debugging common QuickBooks difficulties.