I just want to report on my findings... NOD v5 business edition* causes blue screens (BSODs) on my Win7 64-bit PC whenever I try to mount a TrueCrypt 7.1 volume. This happens 90% of the time. About 1 in 10 times I can actually mount the volume. I tried many possible solutions, but only after uninstalling NOD did the BSODs go away. I'm now happily running on Microsoft Antivirus with no problems. No doubt my company is going to frown about that. The funny thing is I have the exact same PC setup at work, and did not experience the issue (yet). Then again, I did not mount a TrueCrypt volume more than once there. Other solutions tried (unsuccessfully): * Exclude S:\ drive from NOD32 scans. BSODs continue. * Create new container on Win7 and copy data over. BSODs continue. * Disable verifier.exe. See http://kladde.org/~meid/blog/index.php/bluescreen-with-truecrypt-on-mounting-container/. Did not help at all. BSODs continue. * Disable NOD antivirus. BSODs continue. * Run CCleaner. Initially it seemed to work. I could mount two TC volumes at the same time! But BSODs returned the next day. * Ran a full disk scan. A total waste of time. BSODs continue. * Googled around a lot, but no definate solutions. BSODs continue. * Uninstalled NOD. No more BSODs. If someone can provide me with a working NOD solution, I'll reinstall NOD. * Edit: sorry, it was NOT the business edition, as it does not exist yet. I only thought it was. Thanks for pointing it out, Marcos.