How to Troubleshoot QuickBooks Error 1321 Like a Pro
Error 1321 is an installation error in QB and appears as “The installer has insufficient privileges to modify the file C:\Program Files\Intuit\QuickBooks\sdkeventl.DLL”, or “The installer has insufficient privileges to modify the file”. This discussion shall unfold the main causes of QuickBooks Error code 1321 and the strategies to fix it on your system. So, keep reading it all to its conclusion.
Read more: https://qbsenterprisesupport.com/quickbooks-error-code-1321/
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Rebecca Cooper commented
QuickBooks Error 1321 shows up when the installer cannot update or modify a file because of permission issues. I have seen this during updates when antivirus blocks the installer or when the Windows folder permissions are too restrictive.
Here are a few steps that usually fix it:
Disable antivirus temporarily and try the update again.
Right-click the QuickBooks installer and choose Run as Administrator.
Go to C:\Program Files\Intuit\QuickBooks\ and check that your Windows user has full control permissions.
If the error persists, run the QuickBooks Install Diagnostic Tool from Intuit.
I once dealt with this on a hosted setup through Ace Cloud Hosting and their support walked me through resetting folder permissions and it worked right away. Most of the time the error comes down to a simple security or access conflict rather than a bad installer.