! Warning: Editing the registry is a tricky thing. If you change something important you might destroy your Windows. The author of this article is in no way responsible for any damage caused!
Our mailserver experienced a weird phenomenon today. Whenever we wanted to log in, the input boxes of the login screen were black and so was the title in the window header. After some searching and finding this useful Microsoft KB 906510, I was pointed to the registry and specifically to the location HKU\.Default\Control Panel\Colors. I applied the workaround from the Microsoft KB (which was exporting the registry keys from a healthy server and then importing them to the mailserver) and it worked again.
I got interested and was questioning myself what all the keys did in HKU\.Default\Control Panel\Colors. So for me and those who are interested a list of all the keys, their default values (for Windows Server 2003) and what specific part they affect (the ones I could quickly find).
