I see the help here (http://www.pcreview.co.uk/forums/thread-461000.php)but want to understand what caused it. Currently I'm virus scanning an external hard drive (that is the HD out of my laptop). What I/O operation is it speaking of? The virus scan is still going on no problem - except that it's taking forever.

PS - the hard drive in question is F. I have no clue what DR2 is. Is this error referring, do you think, to the external I have plugged in? Or is it referring to the HD in my computer?

More likely an external and the USB crapped out for a bit.

With each passing hour I'm feeling closer to having to spend some big bucks to retrieve the data from this drive. :( Here's my original problem (https://www.askmehelpdesk.com/operating-systems/windowsxp-ntoskral-exe-missing-corrupt-54889.html). It's looking more and more like a hardware problem than a virus or something.