Security Update Help!!!!!!!!-

I had a security update last night on my free version of avast on my pc. I installed it, and it asked to reboot, which I did. Now, my computer won’t get passed the lock screen. It boots up, and when it comes to put in my password, it doesn’t show it. I usually just click my mouse, and the box pops up to enter password, but since the update I can’t do anything. Help!!! How can I fix this? Thank you.

Are you able to start it in safemode?

I haven’t tried yet, as I’m not at home. If I am able to what do I do after that?

Try to reinstall Avast.