>I changed my hard disk to a Samsung 830 SSD 500gb.
>
>Used Paragon Hard Disk Manager 12 Suite to transfer everything to the SSD.
>
>All worked fine. Windows runs OK, all programs run OK.
>I can Build my project with a recompile all, OK.
>
>However...
>
>When modifying a form, and then saving the form, I'm getting errors (often, but not all the time).
>Error is: File access is denied c:\abc\forms\whatever.scx.
>
>Press Cancel on that. Then close form again. Asks me if I want to save. Say yes then gives C5 error.
>
>When looking at the form, it does in fact save the changes.
>
>I don't know if this is caused by the use of the SSD drive or not. Any ideas on what to look for?

Take a look at your Windows System and Application Event Logs, see if they recorded any errors around the times you saw these problems.

If you're using antivirus, see if you can exclude your dev and temp file folders from real-time scanning. One simple test might be to temporarily disable all real-time scanning to see if the problem persists.