VS2017 Unable to copy file roslyn

The colleague report a strange error about build process that "Unable to copy file"

This error cannot show on my computer.I checked the versions both of my and the colleague.
  • 26430.13 -->My
  • 26430.15 -->colleague
My computer shows the same error while the upgrade to the same version.

  1. Open TaksManager stop process "VBCSCompiler.exe"。
  2. Navigate to roslyn folder and removes all of the files。
  3. Rebuild.You will need a reboot while the error still happened.

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