''<p>marengoon [[#question-1537954|said]]</p>'' <blockquote>can not receive emails, something about CL VIEW windows installer error 90, cannot install necessary files </blockquote> Please report the error verbatim or better yea procide a [https://support.microsoft.com/en-au/windows/use-snipping-tool-to-capture-screenshots-00246869-1843-655f-f220-97299b865f6b screen shot] of what you are seeing. That description is insufficient to identify what the issue is, or even indicate what the windows installer is doing running in a Thunderbird session.