For the last 10 months or so, Norton has been finding files on our hard drives that do not show up in the Windows tally. There is a LARGE difference. Windows sees 186,000 files. Norton Antivirus sees 612,000 files. This number has grown steadily over the last about 10 months. Besides Norton Internet Security, we have several anti-spyware/malware programs active on our computer including Spyware Doctor, Counterspy, and Spybot. None of these seem to have a problem with these "invisible" files. What can be the problem?