1 - The installation file has been used to install XMetaL on my old workstation so I know the file itself is not broken
2 - XMetaL is the only authoring tool I've installed so far - all extending applications need to build on it only after successful installation and I haven't proceeded to them yet.
3 - I've actually uninstalled and reinstalled Microsoft Visual C++ and even that didn't help.
I'm really desperate to find the answer to this issue. Thanks for your response.