Windows 7 contains a really nice tool called the Problem Steps Recorder:
It can be found via the Windows 7 start menu by typing ‘problem step’
Once it’s running you get the following UI:
From here you can record all the clicks and keystrokes that your undertaking, you can even add comments to parts of your display. It finally saves the file as a zip file, which contains a .mht file that can be viewed in your browser. This output file will list things like version numbers of applications running as well as a range of screenshots of each major activity recorded.
Now this is all well and good for sorting your mum’s computer problems, but as an IT pro who has had to document some awfully boring processes, I really think this tool will help me the next time I need to document the install of some software, or some mundane configuration change.