cannot start laptop - windows 10 - since installing and using Cleanup Premium

Accepting the free upgrade for Avast cleanup premium was a great mistake. >:( >:(

My laptop cannot login anymore - windows 10 is stuck on the welcome page.

I tried doing the restart reboot (shift + restart) but also get stuck in the restart page (never ending …)
Please help me as I need to work on my laptop today!!! >:( >:( >:( >:( >:(