Search notes:

Registry: HKEY_CLASSES_ROOT

The keys under HKCR store a variety of subkey types, such as file name extension associations and COM registration information. Most of the subkeys are ProgIds.

HKCR merges values that are stored under HKEY_CURRENT_USER\Software\Classes and HKEY_LOCAL_MACHINE\Software\Classes.

Generally, HKEY_CLASSES_ROOT is intended to be read from but not written to.

Microsoft documentation says:

The HKEY_LOCAL_MACHINE\Software\Classes key corresponds to the HKEY_CLASSES_ROOT key, which was retained for compatibility with earlier versions of COM.

Some sub keys

Some sub keys that are found below HKEY_CLASSES_ROOT include:

`*`
`AppID`
`Applications`
`CLSID`	Inventory of COM class objects.
`DeviceDisplayObject`
`Directory`
`Installer`
`Interface`
`Local-Settings`
`MIME`
Various ProgIds	User friendly identifiers for CLSIDs
`SystemFileAssociations`
`TypeLib`	Information about type libraries.
`WOW6432Node`
`.ext`	Characteristics of files with a given file extension
`Microsoft_ACE_OLEDB_12_0`

No default Powershell drive

PowerShell does not define a default drive for HKEY_CLASSES_ROOT (it only defines HKCU: and HKLM:).

In order to access HKEY_CLASSES_ROOT, a drive can be created with the new-psDrive cmdlet:

PS C:\> new-psDrive -name HKCR -psProvider registry -root HKEY_CLASSES_ROOT

Registry: HKEY_CLASSES_ROOT

Some sub keys

No default Powershell drive

See also