QuickBooks Error 15215 basically occurs while updating payroll or maintenance release. It can be caused due to incorrect installation or corrupt download of QuickBooks, malware or virus, QB is unable to verify the signature and more. QuickBooks Error 15215 server not responding shows different symptoms like your desktop freezes periodically, Windows work sluggishly and responds very slowly, etc. You can resolve the issue easily by following several methods mentioned in our blog. You can also talk to our ProAdvisor who are available 24/7 to guide you. Just call us on QuickBooks Update Error Help Number +1-877-263-2742.