Andrew, I think you need to read up in the INSTALL file in 1.1.0. Jing Liu's sequence of commands seems correct to me, and with 1.1.0, the default install prefix *is* C:\Program Files (x86)\OpenSSL\ for VC-Win32. Cheers, Richard In message <c208566ee5ac44caad482acc09d0923f at MailSvr.tcsl.taxcomputersystems.com> on Wed, 21 Sep 2016 12:54:58 +0000, Andrew Hartley <andrew.hartley at taxcomputersystems.com> said: andrew.hartley> Your step (4) to me appears to be wrong. If you are to install openssl andrew.hartley> to the following directory: andrew.hartley> andrew.hartley> C:\Program Files (x86)\OpenSSL\ andrew.hartley> andrew.hartley> then you need to do: andrew.hartley> andrew.hartley> ? perl Configure VC-WIN32 ?prefix=C:\Program Files (x86)\OpenSSL andrew.hartley> andrew.hartley> When I build openSSL I use nasm, so after the above I do: andrew.hartley> andrew.hartley> ? ms\do_nasm andrew.hartley> andrew.hartley> ? nmake ?a ?f ms\nt.mak andrew.hartley> andrew.hartley> ? nmake ?f ms\nt.mak test andrew.hartley> andrew.hartley> ? nmake ?f ms\nt.mak install andrew.hartley> andrew.hartley> Does that help at all? andrew.hartley> andrew.hartley> From: openssl-users [mailto:openssl-users-bounces at openssl.org] On andrew.hartley> Behalf Of Jing Liu andrew.hartley> Sent: 21 September 2016 13:35 andrew.hartley> To: openssl-users at openssl.org andrew.hartley> Subject: [openssl-users] Failed to install OpenSSL 1.1.0 using 'nmake andrew.hartley> install' andrew.hartley> andrew.hartley> I?ve tried all my best to solve this problem but failed. Can you help andrew.hartley> me? andrew.hartley> andrew.hartley> - OS: Windows 10 andrew.hartley> andrew.hartley> - Perl: ActivePerl 5.12.2 build 1202 andrew.hartley> andrew.hartley> - Development environment: MS Visual Studio 2010 SP1 andrew.hartley> andrew.hartley> - OpenSSL version: OpenSSL 1.1.0 andrew.hartley> andrew.hartley> I tried to compile and install OpenSSL 1.1.0 according to the andrew.hartley> following steps: andrew.hartley> andrew.hartley> 1. decompressed OpenSSL 1.1.0 software package to directory andrew.hartley> "D:\openssl-1.1.0"; andrew.hartley> andrew.hartley> 2. opened the "Visual Studio 2010 command prompt" window using an andrew.hartley> Administrator identity; andrew.hartley> andrew.hartley> 3. switched to the directory "D:\openssl-1.1.0"; andrew.hartley> andrew.hartley> 4. D:\openssl-1.1.0> perl Configure VC-WIN32; andrew.hartley> andrew.hartley> 5. D:\openssl-1.1.0> nmake; andrew.hartley> andrew.hartley> 6. D:\openssl-1.1.0> nmake test; andrew.hartley> andrew.hartley> > So far, all steps went smoothly, but ... andrew.hartley> andrew.hartley> 7. D:\openssl-1.1.0> nmake install; andrew.hartley> andrew.hartley> Here, I got the following error and there was no file being copied to andrew.hartley> the destination directories even though those directories were andrew.hartley> successfully created. andrew.hartley> andrew.hartley> Microsoft (R) program maintenance utility 10.00.30319.01 copy right andrew.hartley> (C) Microsoft Corporation.All rights reserved. andrew.hartley> andrew.hartley> *** Installing development files andrew.hartley> andrew.hartley> created directory 'C:/Program Files (x86)/OpenSSL' andrew.hartley> andrew.hartley> created directory 'C:/Program Files (x86)/OpenSSL/include' andrew.hartley> andrew.hartley> created directory 'C:/Program Files (x86)/OpenSSL/include/openssl' andrew.hartley> andrew.hartley> Can't Open "./ms/applink.c" at .\util\copy.pl line 61. andrew.hartley> andrew.hartley> NMAKE : fatal error U1077: ?C:\Perl\bin\perl.exe?: return code ?0x16? andrew.hartley> andrew.hartley> Stop. andrew.hartley> andrew.hartley> ______________________________________________________________________ andrew.hartley> Registered in England with company number 5347048 andrew.hartley> Registered office at Centurion House, London Road, andrew.hartley> Staines-upon-Thames, TW18 4AX andrew.hartley> andrew.hartley> This electronic message contains information from Tax Computer Systems andrew.hartley> Ltd (a wholly owned subsidiary of tax systems plc) which is andrew.hartley> confidential and may be privileged. 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