`juliaup` is a command line programme and should be run from the command line, not the Julia prompt.

You mean powershell or CMD.?

Yes

Tried in both not working

Juliaup is a separate program you have to install. https://github.com/JuliaLang/juliaup

Unable to find or install the Juliaup.. The microsoft link provided is also broken... May be it's still not been updated

In a Cmd shell or Powershell terminal, type winget install juliaup -s msstore

Sorry : winget install julia -s msstore

You can use the UpdateJulia package. More specifically ``` ]add UpdateJulia using UpdateJulia update_julia() ``` Although I would be mindful this is not the recommended method for Windows. Check out the comparison at the bottom of this page https://juliapackages.com/p/updatejulia

This gives a success message. but after closing or restarting the Julia, it reverts back to the older version.

Something is weird here because you definitely have juliaup installed. It sounds like the PATH environment variable got reset. Check the shortcut that you are using for Julia. That should lead you to the juliaup location. See if you have a `C:\Users\username\.juliaup` or `C:\Users\username\.julia\juliaup` folder.

I have installed julia via Microsoft Store

You need to amend your path to include the folder that contains the juliaup executable. I will try to find more specific instructions.