Found the answer in another forum.
Our files have used .ACS extension for ten years.
Microsoft now uses that for Agent Character files.
System Restore detects any writes to .ACS files and updates the System Restore files.
That makes our application up to 50 times slower.
Quick fix - disable...
We have an application which accesses large files (200+ MB). Performance is acceptable on Win 95, 98, 98 SE, NT 4 and 2000. On Win ME only, the performance is chronically slow. One test which normally takes 15 seconds runs for ten minutes when first started on Win ME. Watching the System...
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