Divisions and Precisions

Oh great.

And I just did a web search on the "cyclic redundancy check" error. No fewer than three sites say, "This issue may occur if your hard disk is damaged or corrupted." Excuse me while I go back up everything I have on my laptop. Grar.

(Edited later to add: Ran check disk on the hard drive. It found some bad sectors but seems to have repaired them. My fingers are crossed.)