For legacy systems, the best course is to contact your local Siemens sales office or authorized distributor to inquire about a replacement license or a legacy copy.
: Windows XP Professional (SP2/SP3) or Windows 2000 Professional (SP4). It is not natively compatible with modern 64-bit Windows 10/11 without virtualization. System Hardware : Processor : Pentium 4 at 1.6 GHz or faster. RAM : Minimum 1 GB. Hard Drive : Minimum 1.5 GB of free space. siemens wincc flexible 2007 download link