id summary reporter owner description type status component version resolution keywords cc guest host 7136 3.1.2 with GuestAdditions >= 3.1.0 makes VisualStudio native C++ compiler throw error C1085 ea1145 "I'm running VirtualBox 3.1.2 on a Windows XP host. Guest Additions were originally 3.1.2 as well. While compiling a native C++ project (hosted on a shared folder) using Visual Studio 2008 the compiler threw a fatal error C1085, ''Cannot write precompiled header file.'' Some investigation made me believe that this could be an issue of the Guest Additions. Subsequently, I uninstalled Guest Additions 3.1.2 and installed 3.0.4. The problem was gone. I then tried several older and newer versions of the Guest Additions. The last one that works for me is 3.0.14, the first one I found ''not'' working is 3.1.0. Even the latest one (3.2.6) does not work. The behavior is reproducible 100% with my setup." defect closed guest additions VirtualBox 3.1.2 obsolete VS2008 C1085 precompiled header Windows Windows