AShop will work on a Windows server as long as it has php and MySQL installed (We do development and some testing on Windows 98 and XP with Apache Web Server), but if the server is running IIS (Microsofts own webserver) a bug in that program will require modifications to the code. The bug makes it impossible to redirect a browser directly after a cookie has been set, which happens at some places in the AShop code. A quick fix is to replace the http redirects with html redirects (replace the header("Location:") code with an html meta tag).