Hmmm...I actually was using an older version (v. 1.2.0) and I saw the update in NI Service Centre to v. 1.2.2.  The update note said explicitly that the update was for crashes on windows computers, so I decided to update it, and this seems to have solved my issue.  Thanks again Ken for the heads up!

I know that version 1.21 is good, as I have it myself.

MondoArt
As for disk errors, I tried to do a chkdsk on my C: drive, and it said it could only do it on a restart.  So I restarted, and CHKDSK reported it couldn't complete the scan due to an error with a "recently installed software package."  I have no idea what this software package might be.

Whilst you did a scan with a third party you now need to find a solution for this. Not a good situation.

If it persists try uninstalling your virus scanner (avast?)