The primary location for updates, formerly known as SIOS. You can search for "TIA Portal V11 SP2 Updates" on Siemens SiePortal .
No. V11 SP2 was officially supported only on Windows 7 (32/64-bit), Windows 8, and Windows Server 2008 R2. It may run on Windows 10 with compatibility settings but is unstable. tia portal v11 sp2 update 3 top download
Always backup your existing V11 projects before applying updates. The primary location for updates, formerly known as SIOS