On Nov 3, 2010, at 7:10 PM, Yersinia wrote:


OK, thanks for the heads-up about a first time virus scan being like Spotlight/taking forever. Maybe I will try Sophos after all. But... what IS "Access scanning" and what do you mean by "files are only ever scanned if the system touches thsm"? By "the system" do you mean OS X?


on access scanning means that when files are read (for the first time in a session) or written they're scanned. It's sort of like spotlight which only indexes when files are changed.

Both programs insert themselves into the OS so that when files are read or written; they scan the file before the OS can do anything.

If this sounds a lot like what malware would do, you're right. Some years back a Sophos update decided that a bunch of Microsoft application support files were viruses. A LOT of folks suddenly ended up with fubared Office installs, and a lot of IT folks cursed Sophos that day.

--
Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group

Institutions do not have opinions, merely customs

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