I am a user of Windows 7 64 bit Home Premium. Recently, I had some problem when installing Aspen Plus 2006 ( a process simulation software). The software was installed and running ok but the help file can not be found. The Help file is very important for software like this. I suspect it has something to do with the MSDE because when I just start to install the software, an error menu come out "MS SQL Server MSDE is incompatible with this version of Windows". So I try to install SQL 2005. But the problem is still there. So, do anyone have any idea? I also try to install SQL 2000 MSDE SP3 from a website, but the installation failed as the menu same just like before happen again.