SQL Server R2 Installation Error: Could not open key

Installing SQL Server R2 Enterprise Edition error message Unable to continue installation, error message:
Could not open KEY:UNKNOWN\COMPONENTS\7ABFE44842C12B390AF18C3B9B1A1EE8\000021599B0090400100000000F01FEC.
Verify that you had sufficient access to that key, or the contact your the support personnel.

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To borrow a piece, hehe, according to the prompt, it is clear that the registry key permissions issues
Resolves a workaround that prompts could not open key during SQL Server R2 installation:
Run the cmd command prompt as an administrator, enter the following statement and run it OK
secedit/configure/cfg%windir%\inf\defltbase.inf/db defltbase.sdb/verbose  
Follow the error prompts to find the registry key 000021599B0090400100000000F01FEC, but this administrator permissions can not be authorized, but also can not be removed, know is the problem here, but how can not be changed, Some registry tools do not work, and this command resets the system permissions configuration.
Red Word part of the command parsing: Generally speaking, this command means to reset the system security configuration to the system default settings,Defltbase.inf is the system security configuration template,defltbase.sdb is the system Security Configuration library, is to rewrite the system security Configuration library with the system default security template. This command resolves many of the permissions issues that are encountered with the installation software, most of which are previously installed with the same software, the uninstallation does not completely cause the registry key to be locked, the permissions cannot be changed, or the table entry is deleted.

Reproduced in csdn:yq495 Blog

SQL Server R2 Installation Error: Could not open key