During the installation of your product, you received a 1402 or 1406 error indicating that the installer is unable to write to a specific registry value. This error was either displayed on the screen or located in the installation log file.
Error 1402. Could not open key: <RegistryKeyPath>. Verify that you have sufficient access to that key, or contact your support personnel.
You should make a note of the exact error message as it will indicate which registry key needs to be corrected. To correct this issue
On the Start menu (Windows), click Run.
In the Run dialog box, enter REGEDIT. Click OK
In the Registry Editor, locate the key indicated in the error message (typically located under HKEY_LOCAL_MACHINE).
Right-click on the key folder. On the shortcut menu, click Permissions.
In the Permissions dialog box, click Add.
In the Select Users, Computers, or Groups dialog box, enter the specific username that you are logged in as, and then click OK. You can also give full access permissions to Everyone group.
Select the Full Control checkbox.
Select the Replace Permission Entries on All Child Objects option.
Click Apply and then OK.
Click OK to close each dialog box.
Run the AutoCAD installation again.
Note: If you receive another error, this indicates that another registry key may be affected. If this is the case, you will then need to repeat this procedure for the new registry entry. It is not uncommon for several registry keys to be affected by this issue.
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