Aug 15, 2007 · Hi. I have a Windows XP machine that was upgraded from Windows 2000. When the machine was Win2K, %systemroot% was equal to C:\winnt. When I upgraded to Windows XP, the %systemroot% value remained the same. Is there any way I can change the value of the %systemroot% to C:\windows without having to do a clean install.

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List of All Environment Variables in Windows 10

It is a system environment variable found in windows operating system. It stores the path of the windows directory. A user can directory move to windows folder by writing %SystemRoot% in run command.

Windows has enough information to set SystemDrive and SystemRoot as soon as you choose the drive where to install it (plus it uses a default if you don’t modify the destination). It sets several default environment variables (including windir ) later in the installation when it initializes the registry.

Microsoft Azure Recovery Services Agent System State Dec 05, 2017 Run and RunOnce Registry Keys - Win32 apps | Microsoft Docs HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce; By default, the value of a RunOnce key is deleted before the command line is run. You can prefix a RunOnce value name with an exclamation point (!) to defer deletion of the value until after the command runs. Without the exclamation point prefix, if the RunOnce operation fails WINDIR environment variable resolves to %SystemRoot% and echo %SystemRoot% outputs C:\windows Not being able to resolve WINDIR is causing me all sorts of head aches. I've tried setting the value of WINDIR explicitly to c:\windows in that console windows provides, but to no avail. I've also tried manually changing the windir registry key's value at. Startups Infected - Windows Startup Programs Database