Avast uninstall corrupted windows

After using the avastclear to uninstall most of my desktop icons and taskbar icons won’t work.

I get the error message “Windows cannot find…”

Is there a way to repair these easily or do I have to do it manually?

Thanks.

Did you restart computer after uninstall?

Yes, also I forgot to mention, links in emails won’t open. I get the same kind of error.