WinCC 7.0 SP3 was a major release introducing enhanced multi-touch capabilities (pre-TIA), improved SQL Server compatibility (2008 R2), and advanced audit trails for GxP compliance. is a cumulative hotfix rollup. Unlike minor updates that add features, Update 1 focuses exclusively on resolving runtime engine errors, graphic rendering glitches, and communication driver (Channel) inconsistencies.
Look at the SITRAIN or WinCC setup log files located in the C:\Program Files (x86)\Common Files\Siemens\Automation\Log folder. wincc 7.0 sp3 update 1