Whilst I track the answers given by the others here, this is a known problem with the NT version of the CDFS driver. The fixes listed are reasonable, but are workarounds. There is as yet no official M$ fix for it (lazy b******s); you could go to SYSINTERNALS and get a replacement CDFS driver which is bugfixed, repairing the problem at OS level and not application level.

This is the point where you remind me you are using Win 98

One of the few remaining Mk1 owners... #00015