While updating Quickbooks desktop you might encounter Quickbooks error 12009.Error 12009 will not let you use Quickbooks.
Causes for Quickbooks error 12009 :
Windows firewall blocking Quickbooks.
Incorrect SSL settings.
To resolve Quickbooks error 12009:
You must manually update the Quickbooks from the Quickbooks download update page.
Starting computer in selective startup and reinstalling Quickbooks.
I hope Quickbooks error 12009 is now resolved!! For additional help in fixing Quickbooks error 12009, call QBSsolved at +1(888) 910 1619