QuickBooks Could Not Initialize License Properties usually indicates Error 3371, which occurs when QuickBooks Desktop cannot load required license data because files are missing or damaged. To fix this issue, close QuickBooks, open QuickBooks Tool Hub, select <span style="box-sizing: border-box; font-weight: bold; color: #333333; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;">Installation Issues</span>, and run <span style="box-sizing: border-box; font-weight: bold; color: #333333; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;">3371 Error Fix</span>. Restart QuickBooks and check whether it opens successfully. If the error persists, update Windows or reinstall QuickBooks Desktop after backing up your company files.