TurboTax support has not been informed of this issue and was not helpful. I reinstalled TurboTax from the DVD and haven't seen this issue, though the improperly signed executables are still in "C:\Program Files (x86)\Common Files\Intuit\Update Service v4"
I'll try to request a refund - maybe enough of those will get Intuit's attention. I am also wondering if the DVDs included older updater executables vs the downloaded version.
