I wann to Upgrade from TFS 2013 to Azure DevOps Server 2019. I am unable to uninstall the old one, the only thing i can do is to unconfigure the Application Server. But then the installer tells me that an installation is not possible without uninstalling the TFS 2013.
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Did you go to *Add/Remove Programs*? – Daniel Mann Jul 03 '20 at 21:30
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Hi, How did it go with this case? was below answer helpful? – Levi Lu-MSFT Jul 09 '20 at 10:11
1 Answers
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You can uninstall TFS 2013 from the Control Panel, go to Control Panel
->Programs and Features
->Uninstall a program
.
Before go to control panel to uninstall, you need to remove the configured Extensions(eg. SharePoint Extensions), go to Team Foundation Administration Console
->Extensions for SharePoint Products
.
See this similar thread.

Levi Lu-MSFT
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that dosnt work for me because some systemrights (my user was administrator). I used some random uninstaller from the internet – Steini Jul 09 '20 at 13:52
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So you successfully uninstalled the TFS 2013 by using the random uninstaller. Right? If yes, Could you share the uninstaller and post it as answer to your question? – Levi Lu-MSFT Jul 10 '20 at 09:27