Thanks for your comments. I've run a memory check which is inconclusive, no errors found. Trying to strip it back as much as I can to remove any "external" factors that could be affecting it. We had no issues on Windows XP with 9.2, since moving to Windows 7 this has started, I have tried 2 different machines, but that's not to see that it's nothing to do with the business' build they deployed, this could be causing the issue.
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