Frequently Given Answers written by Jonathan de Boyne Pollard is a plain html website that you may be interested in. Well, I was because it has some good points about how Windows works – and some more unrelated Windows stuff:

/EDIT: I forgot to mention that he headers are included in the Jedi Apilib as JwaWdm.pas.
I’m working on a new build of TSAdminEx for which I need to query the total amount of physical memory. Locally we can use the GlobalMemoryStatusEx API but there’s no API to do this remotely. It would be possible using [...]

There are a lot of setups out there which just copy some files and then run the application. I often wonder why they really need Administrator rights at all. So IMO, if you want to create a setup for your product you should really consider the following question:
Does your setup really need Administrator rights?

Recently, I’ve found a bug in JWSCL. It happened that the function GetInheritanceSourceW didn’t work for me anymore. A long time ago I used this function for the last time and now again. However the strange thing was that the function returned no error but it didn’t fill a result array with expected inheritance data. [...]

Recently my Windows Vista partition ran out of disk space. Well, the partition has 30GiB but that is not enough even if you choose to install 3rd party software on a separate disk. The main reason why Windows Vista needs so much space is the WinSxS folder which contains a lot of DLL files and [...]