Can't reinstall battle.net/wow

Had issues logging into wow today, wouldn’t let me connect to battle.net and appeared with BLZBNTBTS0000005C error, saying their was a problem updating Agent.

After trying the solutions re deleting Appdata, restarting, etc. I uninstalled battle.net and all battle.net games.

Now when I try to reinstall battle.net it gets to 45% progress, and comes up with the same error.

Really struggling to work out what my next steps are now beyond maybe reset PC.

Anyone got any ideas?

Download Revo Uninstaller (its a very useful program).

Use the program to uninstall Battle.net app and to delete all the lots of trash what the app leaves.

Renistall the app, then reinstall WoW.