# Windows – Updating a (Windows 10 Home) Windows To Go installation

windows 10windows updatewindows-to-go

I have a Windows to Go (W2G) Windows 10 Home installation. The Anniversary Update was released a few days ago. However, I cannot install it because "You can't install Windows on a USB flash drive using Setup."

The fix that I've found everywhere is to change the Registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PortableOperatingSystem from 0 to 1.

However, a W2G installation IS a PortableOperatingSystem by definition. Is it safe to just change the key in this case? Do I have some other alternative (that is not reinstalling from scratch, of course) to update this system?

It did updating a WindowsToGo Pro from earlier R1 143xx Builds several times until the 14393 after changing the PortableOperatingSystem value. For me it worked fine without any issues. Before doing it, use a backup tool to create a full image of the Windows To Go.