Disclaimer: This write-up is for informational purposes. Always consult the official Siemens ReadMe files and Release Notes specific to the software version before performing an update on industrial control systems.
SIMATIC WinCC V7.0 SP3 Update 1 , the most reliable source for information and downloads is the Siemens Industry Online Support (SIOS) portal Download & Availability Official Status : Update 1 was released on April 20, 2012 Delivery Method Wincc 7.0 Sp3 Update 1 Download