Note that the opinions expressed herein are those of the writer, and reflect only their attempt at giving you a fair and equitable opnion on what's available.
Flowcharts assume a certain level of knowledge, and are set out in a potentially confusing manner.
However, the greatest strength of the page is that the information is in highly graphical format, and thus very quick to follow. A personal favourite. Problem specific and with extremely well-layed out. Suitable for children of all ages and skill. Microsoft Personal Online Support Knowledge base of technical support for Microsoft products.