About a week ago, I installed Sophos Anti-Virus Home Edition, version 7.2.2, under OS 10.5.8 on a Mirrored Drive Doors dual G4 Mac, and had no problems initially--I was able to change preferences, run scans, do virus definitions updates, etc. Tonight, I wasn't able to do any of those things, instead getting various error messages from the Sophos app which I wish I'd written down so other people could search for them here. Under the Sophos icon in the menu bar, the option for "Update Now" was grayed out, and when I tried to change various Sophos preferences, alerts appeared telling me the prefs changes failed to take effect. I quit from Sophos, then used Disk Utility to repair permissions, then I reinstalled Sophos the easy way--without uninstalling it first--and after that, it worked properly, though the first time I re-launched it, it displayed the same windows I had opened when I had quit from it (including the last error messages Sophos was displaying) as if it had saved the screen image of the Sophos app's last-opened state.
I should also note that the Sophos log showed no entries for any of the errors I was seeing, nor even the fact that I had launched Sophos tonight--the last entry in the log was five days previously, when it noted a successful update to the virus definitions.
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