ERROR_APPHELP_BLOCK 1259 If Windows Installer determines a product may be incompatible

ERROR_APPHELP_BLOCK 1259 If Windows Installer determines a product may be incompatible with the current operating system, it displays a dialog box informing the user and asking whether to try to install anyway. This error code is returned if the user chooses not to try the installation.
We have an SBS 2003 server that automatically installs updates just fine for several years. Now it is failing to install Microsoft .Net Framework 2.0 Service Pack 1 (KB110806). The error that I find is Error Code: 0x641. I was told to download the collect.exe file to collect the .NET logs, but when I run that, I get the error "No log file exists."
I would appreciate anyone’s help, thank you.
