Redently I have been fighting a lot of "Range Check" errors myself. In my case, they did not disappear with time. But, using the other computer on the LAN I was able to process the same game files that had given me errors without a hint of a problem!
I suspect that there are some temporary files somewhere that may not get cleaned up properly. That would explain why using the computer for other purposes gets rid of the error - the temp folder may get flushed periodically, especially if there is not too much spare space on the hard disk.
I'll need to check those, e.g. wait for the next error and search for all recently updated files. Sounds like fun
