Hello David,

That you hard drives are way full might underlie the crashes you've seen in Composer would be an explanation probably only if no virtual memory is left. If exhaustion of virtual memory is the explanation of the crashes in Composer, then you probably would also be seeing your whole system slowing down prior to the crash. You would not only see Composer slowing down, but any other running app. And you probably would not be able to launch new apps. Have you seen these symptoms of slowdown that would be associated with exhaustion of virtual memory?

Also, when you find that Composer is crashing a lot, then it would be a good idea to bang on some other apps in the same Windows session, with or without Composer also running. Do other Windows apps also misbehave? If so, then the search for the problem probably needs to go beyond Composer; and exhaustion of virtual memory is a fairly likely explanation.

Cheers
-- Mark