Het probleem is opgelost!!!
Dit is de oplossing:
On my computer, the problem was caused by the EACom Updater (something from playing Electronic Arts games on their website). I have no idea if the problem was specific to this program or if it was a fluke and caused by SP2, however, uninstalling it did fix the problem, and I can tell you how to find what's causing it for you.
First I went to the registry but there is a lot of stuff there I don't understand, so I left it alone. Then I remembered X-Setup (
http://www.x-setup.net/) - this is the best program ever made for Windows. It lets you tweak all kinds of things - including the Add/Remove programs list.
So, open Add/Remove Programs, and open X-Setup. My version may be old and I honestly don't know if I have a trial, freeware, shareware or hacked version (but its probably worth buying), so you might have to adjust the instructions to fit yours. X-Setup uses a folder/tree structure, so dig down All X-Setup Pro Plug-ins->System->Software Installation->Add or Remove Programs List Editor. On the right-hand side it will give you a list in alphabetical order of what should be in your Add/Remove programs (so make sure you sort that by Name).
Now in Add/Remove programs find what items are before and after the strange black/striped/graphical area. Then find those same two items in X-Setup. Is there something listed between them?? In my case there was - the Electronic Arts EACom Updater.
If you get the same, or something else you don't need then you can uninstall it manually: Select the item, then click "Edit CMD.." Don't actually edit the command, just copy it (Ctrl-C). Then open a command window (Start->Run->cmd.exe) and paste (usually just right-click with the mouse) the command. Hit enter and it should uninstall whatever was causing the problem.
bedankt voor de snelle reactie
groetjes Eilein