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Hello. This is a hard one for me to understand/solve. Using synapse on delphi 11. I have a main form that starts a thread (TTCPHttpDaemon) defined in a used Unit; TTCPHttpDaemon.create; The initialization section of the the blcksock.pas of sinapse, runs at the very beginning of the App seems to successfully create the socket synsock.WSAStartup(WinsockLevel, WsaDataOnce); I create the thread (log_it() is a function to log messages). TTCPHttpDaemon.Create; TRY inherited create(false); sock:=TTCPBlockSocket.create; FreeOnTerminate:=true; except on E:SysUtils.Exception do begin log_it('TTCPHttpDaemon.Create '+e.message); end; end; end; No errors. Then right here i get the inexplicable behaviour procedure TTCPHttpDaemon.Execute; begin with sock do begin try CreateSocket; except on E:SysUtils.Exception do begin log_it(e.message); end; end; bind(serverip,PORTNUMBER); //portno listen; repeat try b:= canread (1000); RIGHT HERE!!!!! except on E:SysUtils.Exception do begin log_it('****** Canread error: '+e.message); end; end; if b then ClientSock:=sock.accept; ................... on the canread() function the error is 'winsock not initialized' code:10093 And the main form is destroyed, by-passing the except block. What goes wrong, where? This happened suddenly without any change to the App that I could tell. Could it be one of the lates windows 10 updates?