Does an admin account on the affected PCs have the same problem? You did say the user accounts from the affected systems have no problem on other computers, I believe.

And if everything is running Win10, I'd make sure domain functional level is at 2012 R2.

if you log into the PCs admin account or the domain admin account, no issues whatsoever, it's only when using the user accounts
and that is correct, those accounts on any other computer is perfectly fine

correct everything is at 2012 r2, just verified

That's really dumb. Clarify one thing for me. You replied above, but I'm not sure if we're on the same page with your answer:

The local users on their workstations, do they have local admin rights on their workstations (i.e. can they install software, etc without requiring domain admin credentials)? Or are they standard restricted users on their own systems (I'm sure they don't have domain admin rights).

aahhhh ok

No, Users cannot install or do most things on their own, and admin would have to log in and do it for them (which ends up being me lol) standard restricted

Try a test with one computer and one user, and make that user's domain account a local admin (NOT a domain admin), then log in with it and see if the issue persists or not.

issue is still happening

That's really weird. Out of ideas at the moment.

i appreciate the effort anyways

i'm heading out now, will be back in the morning to kick it really hard, only thing i haven't tried lol

Personally I would have shot the guy who renamed my domain but nothing can be done now.

So are these machines, if you took them off the domain co,pletely and set up a new profile on them with basic user rights. Are they still unbearably slow?

Or is the slowness only in your app?

work perfectly fine off of the AD