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Says Firefox has corrupt file and to run the chkdsk utility. How do I do this?

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I received a notice of "Corrupt File" and it said: "C"/Program Files/Mozilla Firefox is corrupt and unreadable. Run the chkdsk utility." I do not know how to do this.

I received a notice of "Corrupt File" and it said: "C"/Program Files/Mozilla Firefox is corrupt and unreadable. Run the chkdsk utility." I do not know how to do this.

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Do a clean reinstall like described here.

If that doesn't help, see http://support.microsoft.com/kb/315265

Please let us know of any further progress on this issue.