I cloned my old Windows 7 hard disk to a shiny new Seagate Momentus XT 500GB using the free EaseUs Disk Copy tool on my laptop. After the clone process I used the Windows 7 installation disc to start the automatic startup repair. This took maybe 15 minutes and then my cloned disk was able to start.
Now the cloned disk boots until the login screen and then I can't do anything because my keyboard just doesn't work. I tried connecting an external USB keyboard but this didn't help. The mouse is working fine.
Note that the keyboard works fine in BIOS and in the Windows startup options menu. I booted into safe mode and again the keyboard is not working at all.
I also noticed that the letters
Press CTRL+ALT+Delete to login are now shown in italic font but they used to be shown non-italic on the original disk.
I have now replaced the clone with the original disk again and from here everything works fine.
Doesn't anybody have an idea how I can get my keyboard back?