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About 3 months ago, I purchased a Dell XPS 13 running Windows 8. Ever since, whenever I try to shut down/restart my machine, I get an alert that looks like this:

enter image description here

This doesn't happen each time but it happens once in a while. The following is the sequence of events that produces this:

  1. Using a web browser, for instance, Google Chrome (in deskptop mode). I close the web browser when I am done.
  2. On the desktop, press ALT + F4 to bring up the prompt that let's you switch user or shut down and so forth.
  3. Before the prompt comes up, I get the alert like the one in the screenshot.

I think this may be caused by something Microsoft Upload Center is doing but I'd like to know the exact cause.

Edit 1 : I have now noticed this happen independent of the usage of Chrome

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Run ProcessExplorer, use the crosshair, move it to the Window and now ProcessExplorer highlights the process which shows this message. – magicandre1981 May 20 '13 at 5:28
@magicandre1981: This string is found in Shell32.dll, but your suggestion is useful to use Process Explorer. – harrymc Jul 28 '13 at 7:18
Do you have any sync program installed? – harrymc Jul 28 '13 at 7:18
Nope, but I do see Microsoft Office Upload Center running in the background – karancan Jul 28 '13 at 17:30
You should in this case have the Upload Center yellow icon in the notification area. If you are not using SkyDrive and/or the Office "Save to Web", read Disable Microsoft Office Upload Center. See also this link. – harrymc Jul 28 '13 at 19:07

Note that when closing the web browser, it may actually still be running in the background.

Consider using the menu and doing Quit instead of closing the window.

This is particularly valid if you do large file transfers with your browser.

Alternatively I would look into the process tree for active processes or possible sources of such transfers.

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Doesn't Chrome quit a download if it is progress and the browser has been closed? I have checked the processes after quitting Chrome and it definitely isn't in there – karancan Jul 26 '13 at 22:13

Your problem seems to be caused by SkyDrive and/or the Office "Save to Web".

See the article Disable Microsoft Office Upload Center and try it out, making sure that you can reverse all settings.

If this fixes the problem then this is a bug in SkyDrive.
You might try to :

  1. find an alternate way of using SkyDrive not from inside Office
  2. use another cloud storage than SkyDrive
  3. do forcefully shut down the computer.
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I tired the other answers on here and nothing seemed to help. I then installed Windows 8.1 and am not seeing this issue anymore.

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