I have been trying to install the latest version of Boost from sourceforge.net. I have a Windows Vista operating system. I downloaded the boost.zip file and the boost-jam.zip file. I was able to extract the boost-jam file without problems. However, whenever I try and extract the boost.zip file to a folder I created I get the message: explorer.exe - Application Error The exception unknown software exception (0xc000000d) occurred in the application at 0x75afc02c. I tried ending the process explorer.exe, but when I kill that process, I am unable to do the extracting. I know this is a basic problem. I doubt that the issue is specifically Boost-related but since the problem arose in a boost-context, I'm hopefully on topic. Many thanks for your help. Paul Epstein