The QuickBooks error 15270 signifies an issue during payroll update due to a missing or corrupted file. The QB error 15270 will crash all the running programs in your desktop, and hence it needs immediate troubleshooting. To fix the problem, turn off the User Account Control and open the control panel on your computer and select to see the large icons. Now, click Use Accounts, click Change User Account Settings. Further, turn off the notifications and click ok to save the settings.The next step is to update the QuickBooks application, go to the Help menu, click Update QuickBooks, and then select Update Now. If you still see QuickBooks update error 15270 , you will need to download and install the QuickBooks Tool Hub on your PC.