I hate to give up on something like this!
How did you originally determine the name of the Skype ring file?
Did you use something like SysInternals Process Monitor? -
Process Monitor - Windows Sysinternals | Microsoft Docs
If you're not familiar with it, ProcMon displays and records
every HDD I/O, whether normal disc activity or registry activity.
You would begin execution of procmon.exe (as Administrator), then make Skype "ring". Then immediately turn procmon's "capture" feature OFF as the procmon line item entries will be literally flying up the screen (hundreds, if not thousands of entries are generated each minute -- and we don't need to capture any line items
after the Skype ring file has been played ("rung")) . Procmon writes directly to the page file. Do not keep ProcMon running for hours without deleting the current captured entries as procmon uses up virtual memory at a very fast rate and could end up causing your system to freeze, requiring a hard shut-down.
You'll see the item icons for "capture", "delete entries" and others at the top-left (or top left-middle) of the screen. Simply hover your mouse over the icons to determine what they are. Look specifically for "Capture" so that you can turn it off immediately following the Skype ring. This will not only result in less entries to go through, but also give you a definite STOP point.
The name of the audio file that was accessed for the Skype ring will be among the entries -- you just have to find it. ProcMon also allows you to perform various kinds of summaries - by file, by directory, etc...
The bottom line here is that we need to be sure that we're working with the correct file(s) - and prove it. ProcMon is the easiest, fastest and most reliable way to verify the Skype ring file that I can think of.
Regards. . .
jcgriff2