In 1995 Microsoft introduced the registry, shared DLLs and much more so that you no longer find many softwares that run without installation on the host machine.
But let's pick on Office. Microsoft's version is LOCKED to the machines its installed on. So let's find PORTABLE OFFICE. Here it is -> http://portableapps.com/suite
For others we go looking...
I've got several PCs arround the house that I share movies, files and printers over Media Center and all. But how do I share a program? Let's say I have Office (just an example) installed on PC 1 and I want to access it on PC 2. Using my wireless router, how can I access this program from PC 2? They both run Vista Ultimate and I can go to the Public folders on each of the PCs. Some of my PCs are connected wirelessly and others with a networking cable. I tried making a shortcut to the Public folder but it won't work. Someone got an idea?