It means CF found an infected atapi.sys and restored a good copy it found in another location on your system such as c:\windows\ServicePackFiles\i386\ or c:\windows\system32\dllcache.
Kitty ate it was the developer's way of adding humor to the infected file going bye, bye.
Although your issue has been resolved, it is
not a safe practice to be following specific instructions provided to someone else especially if they were given in the HijackThis forum. Those instructions were most likely given under the guidance of a trained staff helper to fix that particular member's problems, NOT YOURS after careful evaluation of the malware involved. Before taking any action, the helper must investigate the nature of the infection and then formulate a fix for the victim. Although your problem may be similar, the solution could be different based on the kind of hardware, software, system requirements, etc. and the presence of other malware.
Using someone else's fix instructions could lead to disastrous problems with your operating system.
If you need assistance in the future, it's best that you tell us what specific issues YOU are having rather than point to someone else. That's what this forum is for so feel free to
start your own topic anytime and someone will assist you with your issues specifically.
Thanks for your cooperation.
The BC Staff