I had another Windows on drive C. Now I have Windows 7 on drive D. I tried to delete all files and folders or format drive C, but my Windows 7 didn't let me. So I inserted booted in the Ubuntu live-CD, deleted all files and folders in drive C without any problems. Then I mistakenly started to format drive C in Ubuntu, but I cancelled it. However I now get this error in a black screen:
Reboot and Select proper Boot device or insert Boot Media in selected Boot device and press a key
I thought that uncompleted format in Ubuntu caused it. So I booted from a Windows 7 disk and from there I reformatted the C drive successfully, but I still get the same error. Any ideas?