I've had PDN for a long time, and have updated multiple times with very little effort and almost no issues. So this is a first for me. Seems to be a common issue though. (My missing .msi # is 324570271, unlike Champ's, but I doubt that's relevant.)
first time user in this forum so apologies in advance if format is rather unattractive
Leafed through multiple threads.
Downloaded the NET framework, only to be told V4 is already installed.
Downloaded the MicrosoftProgram_Install_and_Uninstall.meta.diagcab link.
Downloaded Toe_Head's diagnostic link.
Below is the reading order of events chronologically.
1>2>*creates a new .msi each attempt*>3>1>2>*even tried renaming files - same result as 3*>1>*chose cancel*>*bar reverses*>4