I think the problem is eliminated (not solved!!)
Marc thanks you for your patience and support .
Resolution:
Some time ago I tried to spread diskaccesses as much as possible and moved Studios render files over to my scratch disk (the 1TB disk listed in the MSinfo)
This must have been when the problems started. I connected the problems with the project I was working on at the time, with the large number of photos and so I happened to concentrate on the input side.
Note that there is nothing wrong with the disk, I have run chkdisk on all disks , there are applications using the disk, there is an secondary paging file on the disk. No problems. In fact whenever I compile a DVD from Studio I use that disk for the DVD image, so Studio has no real problems using it. But somehow the renderroutines do not like it.
I moved the render files over to another disk (the E: in the MSINFO) and all problems are gone !!
I think that the crashes in studio have led to some corruptions in studio files so I deinstalled all studio material and reinstalled it. This I however did before moving the render files ( I had not thought of that yet then) and it produced no change, not until I moved the temp files did the problem go away
So somehow the combination of the 1TB disk + rendering leads to the hangs in the disk driver.
I think all the problems mentioned in the other chain “funny editing” also are solved with these two activities.
And yes it applies to both S12 and S14 after moving the render files
Just lets hope that this is the final conclusion