Error 1406: Setup cannot write the value to the registry key

For window Xp users .. start >> all programs >> accessories >> command prompt >> type
"

secedit /configure /cfg %windir%\repair\secsetup.inf /db secsetup.sdb /verbose"

press enter And then start the installation

For windows vista & windows 7 users .. 

First go command prompt by typing cmd into the Search box in the Start Menu and hit Enter.

under programs(1) .. do a right click on cmd & select run as administrator

And type "secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose"

press enter And then start the installation.

"Error 2203. An internal error has occurred"

When you get an error 2203 while installing office 2010 follow these steps..
1. Navigate to the Temp folder by typing %temp% into the Search box in the Start Menu and hit Enter.

The Temp folder will open…right-click an empty area in the folder and select Properties.

Select the Security tab and under the Group or user names box click on Edit and then Click Add

Now type Everyone in the Objects Names box and click Check Names which will underline it as shown here then click OK.

Now under Permissions for Everyone click the box to give it Full control and click OK

2.Perform clean boot

Now restart the Office application installation