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I had previously installed an Ubuntu One client as a test on a Windows XP machine. Now I wanted to change the account for the client to a production one but had problems changing the email address so decided to do a reinstall.

  • Ran uninstall.
  • Downloaded ubuntuone-3.0.2-windows-installer.exe.
  • It downloads, goes through the unpacking/install – strangely some of the messages say updating as if it was replacing something that was already there.
  • I do not get the setup/signin screen. There is no ubuntu% processes running. The Program files/ubuntuone directory exists with data and dist folders.
  • The U icon is on the desktop – pointing at ubuntuone/dist/ubuntuone-control-panel-qt.exe but this does not run.

Ran uninstall again, deleted Program files/ubuntuone directory, removed any ubuntu entries for registry, remove all 'application data' ubuntu files and directories, rebooted. Downloaded install again - exactly the same as above.

From the deleted registry entries the previous successful install was 2.0.3, I therefore re-installed 2.0.3 and everything is working again. Not sure if this is a problem with this computer or a more general problem with 3.0.2 and XP?

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what about %appdata% directory? look for any entry – Web-E Jun 26 '12 at 9:14
@Web-E - thanks, have also tried deleting 'application data' files and directories - no difference. – user73303 Jun 26 '12 at 10:04
@user73303 Could you test the workaround from the answer and indicate if worked for you? – lgarzo Jun 29 '12 at 10:16

Known bug with 3.0.2 windows installer.

Workaround for the problem from the same article:

Delete mswsock.dll and powrprof.dll from UbuntuOne installation directory/dist subdirectory (e.g. C:\Program Files\ubuntuone\dist). After this the native libraries will be used and the application will be able to start.

The reason is:

dist/mswsock.dll and dist/powrprof.dll [...] were taken from a Windows7 system

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