Upgrading to Wireshark 3.4.3 64-bit Npcap 1.10 failing

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Similar to npcap issue 226
Have you tried doing the install outside of Wireshark using the npcap installer ?

I did remove npcap and attempted to use the npcap installer. I got the same results, unfortunately.

C:\Users\UserName\ - are you logged in as "UserName"?
Is there a chance the TEMP environment variable is hosed?

C:\Users\IEUser>set | findstr /I temp
TEMP=C:\Users\IEUser\AppData\Local\Temp
TMP=C:\Users\IEUser\AppData\Local\Temp

I am logged in as UserName.

H:>set | findstr /I temp

TEMP=C:\Users\UserName\AppData\Local\Temp

TMP=C:\Users\UserName\AppData\Local\Temp

H:>