Thanks for this tip ! I wasn't able to get past the KDCOM.DLL line in safe mode, so I expanded the files you mentioned above and at least I've gotten past that issue. I still have some work to do, because all I have now is the Windows XP default desktop wallpaper. I believe that this issue was created by a rogue anti-virus / anti-malware scanner that was installed by a "drive-by" malware from an advertisement. Thanks again !