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The problem is caused by a connectivity option – It turns out that this particular problem is usually caused by a change in the Connectivity Options menu that forces the device to use credentials to automatically complete the device configuration and reopen applications. Here is a shortlist of possible culprits that may be responsible for the “This PC is always being used by someone else” error: It turns out that several different scripts are triggering this particular pop-up. We investigated this particular problem by reviewing various user reports and trying different recovery strategies that other affected users have recommended for this particular problem. What is the cause of the “This PC is being used by someone else” error message?
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