On Apr 28, 2010, at 8:52 PM, Jonas Lopez wrote:

System file modifications keeps causing re-installs
With the use of various mice and all the other similar (finger moving flats) we keep finding the system will no longer load, because a required file has been inadvertently or on purpose moved by accident or maliciously. Can all the system be put into a folder and locked in 10.4 or 10.5 G4 etc? All you got to do is unlock it and your back to damage, is there a way to require a password?

Any System file should ALWAYS require a password to move it or modify it. The only normal way this happens without requiring a password if if you've enabled root user, and you're logged-in as "root". It may be possible for some type of malware to get root access and change the ownership & permissions so that System files can be modified without a password or root user login, but this is highly unlikely on a Mac AFAIK.

It sounds to me like you may have a failing HD or bad RAM. These are the two main causes of modified System files (read this as "data corruption"), that happen without a request for an admin password. There should NEVER be modified System files without some password request.

Rather than doing a full System reinstall, you should try reinstalling the latest Combo Update first to see if that solves your issues.

I don't think the usage of "various mice" or whatever "finger moving flats" are has anything to do with modified System files. This is likely a coincidence.

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