I finally accepted that it was best to reinstall Windows. Not fun, but now it works.

Thanks for you help.

To clarify one thing I want to uninstall 2008 R2 and install 2008. I have earlier uninstalled R2 and installed 2008, but SSRS is not installed for some reason and...

I have tried to uninstall it and reboot many times. But it does not work.

After I uninstalled it from controll panel, I still see some stuff from sql server...