Hi Bharat,
>>First issue is that marketplace app doesn't even notify that update is available. Second when I try to force update it gives me 80070020 error. Anyone seen this error?
Have you checked the latest version for your updated app, for Universal app, the setting of "Generate app bundle" is "If needed" by default, this may
be the reason, you could try to set the option for 'Generate app bundle' to "Never" and create package again.
For the error code, I can only find this related KB:
http://windows.microsoft.com/en-us/windows/windows-update-error-80070020#1TC=windows-7
The cause might be a that program running on your computer is interfering with Windows Update, you could try to restart your computer and update your app again.
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