Was the fresh install in a new location, yeah? That's demonic if it is lol. That should NOT happen!
If you installed it in the same location as before it IS possible. I've seen problems like that with Windows in the past. Where files refuse to change or appear not to etc. Corrupted MFT (Master File Table) most likely but could be a host of other things also. Tricky to fix without a heap of investigation (posting Windows logs to experts online to decipher etc).
Also, make sure you run a good anti-virus scan just to be sure I use SUPERAntiSpyware Free Edition & it has never let me down. Has even found things Kaspersky has missed.
Sounds like your issue is fixed though? Sorta.
I’m just going have to use the sounds that working.