When installing SQL Server R2, the error verify that you had sufficient access to that key,or conta ....

The following error occurred: Could not open key:unknown\components\7abfe44842c12b390af18c3b9b1a1ee8\ 000021599b0090400100000000f01fec.
Verify that you had sufficient access to that key, or the contact your the support personnel.

Solution: Run the cmd command prompt as administrator, enter the following statement and run secedit/configure/cfg%windir%\inf\defltbase.inf/db defltbase.sdb/ Verbose . then shut down the firewall , previously installed without deleting, to the administrator rerun, choose a new installation, he will only install No, take a new instance name to succeed