Generally speaking, the windows 10 upgrade process goes fairly well. But this evening, when upgrading from Windows 7 to Windows 10, I saw a very interesting dialog appear. 

For a while, the title bar of the dialog was blank. Then, the mysterious window revealed itself: Microsoft Visual C++ runtime library. No other message; no icon or button to click. 

I sat back for a moment, tried to relax (just as the on-screen instructions advise you to) and eventually clicked the little X. 

See no further progress, I held down the power button for five seconds to shut down the machine. Next, I took a sip of tea, powered the laptop back on, and the upgrade completed successfully.

See, just sit back m, relax and trust the Windows 10 upgrade process!  Some tea can definitely help ease the stress!