Updating ATI Home 2011 from 6597 to 6696 fails with error 1603

Hi experts,
I am running Win 7 64bit.
I run using the "run as administrator" attribute.
I have stopped every other application before running the update.
This is a fully licensed version. Why I am getting this error when updating ATI Home 2011 from 6597 to 6697 and fails with error 1603. Can I fix this issue? Thanks for everything.

Error:
Acronis installation program encountered the error #1603: “ (0x10002)
Tag = 0xAD997C19487EB3379
Fatal error during installation (0xFFF0)
Code = 80070643)
Tag = 0xBD28FDBD64EDB8BC”
A possible reason might be that you do not have enough privileges. Please check the installation troubleshooting section of the product documentation.
