Install fails with: Key not valid for use in spacified state

[Gabe Avila]

Win7 32bit latest SP and latest updates.

I have used SourceTree for a while there no problem.

When upgrading to SourceTreeSetup_1.6.3.exe something went wrong and now I cannot install any version of it.

During "Status: Updating component registration", a message-box with caption "SourceTree" pops up saying: "Key not valid for use in spacified state".

I restored to a previous restore-point but didn't help. Cleaned up my creds vault, deleted any SourceTree leftover registry entries, and check to see if there are any SourceTree certs that might need to be deleted, but NO LOVE.

How in the world can I fully uninstall this thing so it lets me install 1.6.3?

I've been forced to use VS 2013's git integration and I'm about to go Hara-Kiri if this goes on for much longer man!

Thanks in advance

[wftpeterok]

I have the same issue but only on one machine. Other updated fine.