One of the difficulties of dealing with a new operating system (even if it's Windows!) is getting older programs to work. I have an installer of Maple 8 -- a symbolic computation program-- and I wanted it to work on my new machine. I tried installing it but couldn't make it work, because it was developed for Windows XP. I didn't want to buy the newer version because of the cost; and I also preferred the older version (the latest version is Maple 14).
I did a Google search. The first hits I obtained suggested installing a virtual machine and then running the program within the virtual machine. But that was nuts: given the limited capabilities of a netbook, adding a virtual machine would probably make the system unstable.
After refining the search, and using keywords "windows 7 compatibility older software", I got a hit for getting older programs to work on Windows 7. It's a support page from Microsoft and among the things it said was "To change compatibility settings manually for a program, right-click the icon for the program, click Properties, and then click the Compatibility tab." The tab will then contain things that you can manually adjust to make the program work. After fiddling with the settings, I was able to install the program and get it running on my netbook. :-)