The TT 2009 installation errors is XP SP2 persist. I've removed all prior installations of .NET on my machine and reinstalled. Ran the "repair" utility and reinstalled TT 2009. I'm still no closer to running TT. After 10 years of using TT, I'm moving to TaxAct and never going back. I thought tax preparation was painful. This installation process is worse than doing my taxes while having my teeth drilled.