As of current industry standards,
Improved communication encryption and user rights management. Wincc 7.0 Sp3 Update 1 Download
If you do not have the files, you may need to order the update DVD through your local Siemens Representative using the product identification numbers found on the SIOS site. Installation Instructions As of current industry standards
Before downloading WinCC 7.0 SP3 Update 1, ensure your hardware and software environment are compatible: Wincc 7.0 Sp3 Update 1 Download
Use "Add or Remove Programs" in the Control Panel to verify current version