NVATABUS.sys belong to system-CD here GA-7N400 Pro2. Is an IDE-tool.
Had to shutdown after PC freezing when i had a static discharge. low humidity.
earlier could repair this very same problem by copying file to system32\drivers but not here.
Solution: copying from recovery-console worked. had file on floppy-disk.
other repairing with chkdsk /p failed.
