Hello, Strange problem with Indy 10 on 64-bit. When I run a program which uses Indy 10, the program is crashing at start in function IN6ADDR_LOOPBACK_INIT in IdWinsock2. Steps to reproduce: Windows 7 Pro, Delphi XE2, Indy 5438, create a new project, include IdWinsock2, compile\run in 64-bit, crash. Interesting thing is that worked before November 2017, now is crashing even with earlier Indy revisions (2016 december - 2017 october). The only thing was changed on my computer in November was the Windows 7 monthly updates.