Get this error message:
"Error: std::bad_alloc"
How low is your Rig's RAM?
How much is the available memory (RAM) when you start Bitcoin Core?
If you're using dbcache in your config file or Qt settings, try to decrease it to half of your total RAM,
if it's already set to half, then lower it more.
-snip- then put the file dump which is this "UsersAdministratorDesktopWalletsDesktopDBitcoinBUwallet.dat" rename it to wallet.dat
The contents doesn't look like a wallet.dat to me, it's more of a "
dumpwallet" command file export but OP might have included "
.dat" extension to it.