Payroll update error: What's that about?

I tried to download a payroll update last week, and Quickbooks failed me miserably. I got the following message:

[Error 15222] The payroll update did not complete successfully. Quickbooks could not verify the digital signature within the update file. For troubleshooting steps, note the error and type the following into a Web browser windows: [Error 15222] The payroll update did not complete successfully. Quickbooks could not verify the digital signature within the update file. For troubleshooting steps, note the error and type the following into a Web browser windows:

I went to the web site, nothing. There is no list of Error 15222.

Now Quickbooks no longer automatically calculates Federal and State Withholding.

Anyone have an idea?