IT deleted all my credential manager passwords today on Window 10, how do I login?

W10 64bit laptop. IT at work was troubleshooting an email issue and decided to delete all my credentials (useames/passwords). It did fix the email domain issue - laptop user account is not part of any domain.

When I get home, use computer for a couple hours, blue screens on me - ran out of memory... Reboots. My normal login. Doesn't accept my password. I have reset the password, I have coect to my LAN and laptop is on inteet... won't take password. Anything I can do?

I am able to login to multiple other W10 PCs using the same user/pass...