The simplest way to delete a corrupt registry key

keyswindows-registry

I have a registry key that produces an error when selected in regedit. It may have multiple but unknown subkeys. regeidt isn't up to the task what is the best way to wipe out this key and anything within it?

Best Answer

If you don't feel up to hacking together a script Sysinternals RegDelNull is another option for deleting "difficult" registry keys. And as ever, handle with care, like anything that messes directly with the registry it's a loaded gun and it can do a lot of damage.

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Windows TcpNumConnections registry key

Not having the source code to Windows it's a little difficult to tell for sure, but my reading of the documentation on Microsoft's site seems to say that this applies only to open TCP connections. To your particular question about SYN_RCVD state connections I'd point you to the TcpMaxHalfOpen parameter. The existence of TcpMaxHalfOpen further makes me think that TcpNumConnections applies only to open connections.

In the end, only the source code is going to tell you for sure. (That, or more in depth documentation.)

Windows – Change Permissions on Registry key via Command line

There is an excellent rundown of how to do it in PowerShell here.

Essentially, you can use Get-Acl and Set-Acl in PowerShell like you would for any other path.

$acl = Get-Acl HKLM:\SOFTWARE\stuff
$rule = New-Object System.Security.AccessControl.RegistryAccessRule ("Domain\user","FullControl","Allow")
$acl.SetAccessRule($rule)
$acl |Set-Acl -Path HKLM:\SOFTWARE\stuff

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Windows TcpNumConnections registry key

Windows – Change Permissions on Registry key via Command line

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