"File currently locked by another user" error in Windows Explorer

I have run into this artifact over the years with programs other than SU and Windows earlier than widows 7. This has also been discussed in some of the Sytem Internals posted by Mark Russinovich. The windows memory manager is basically a demand function and when a program ask for memory ( Programs cannot touch real memory but only virtual memory.) it is quick to assign some memory in 4 k blocks what is called working group. When the program is closed it releases that at a much slower pace. So if you close a program and then try to immediately open it you will get this error.
I cannot say if your issue is same or why W8 and up don’t have problem maybe just the fact MS has made changes in memory manager so it does not show up.
Just more triva for you

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