I tried everything suggested in this discussion, and by the support team, but every time I tried to update it would fail with the Problem Signature:
Problem Event Name: APPCRASH
Application Name: IntuitUpdater.exe
Application Version: 4.5.1.0
Application Timestamp: 57c9174e
Fault Module Name: atcuf32.dll
Fault Module Version: 1.28.222.0
Fault Module Timestamp: 5d874f64
Exception Code: c0000005
Exception Offset: 00002d8e
OS Version: 6.1.7601.2.1.0.256.48
Locale ID: 1033
Additional Information 1: 0a9e
Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
Additional Information 3: 0a9e
Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
...
I finally realized that atcuf32.dll is part of the Bitdefender Antivirus 2019 program. Once I temporarily turned off Bitdefender (turned off the Firewall, Vulnerability and Advanced Threat Defense, all under Protection Features, and under Settings I turned off the Bitdefender Shield for 15 minutes). everything worked fine. I have no idea if the problem is with Turbo Tax 2019 (all the previous versions worked fine under Bitdefender), or with the latest level of Bitdefender (2019). My money is on Intuit having done something wrong for the 2019 version.
