bad avast free install

HELP
yesterday I started to install Avast free which went wrong
since then it has jammed up my computer & I can’t get rid of it – tried uninstall, delete a file etc
but it’s “still installing” after 24 hrs & a couple of restarts

it also installed Avast browser which won’t uninstall because the antivirus is " still installing"

how can I get rid of it

Did you remove previous used antivirus before installing avast?

Read instructions. https://support.avast.com/en-us/article/Uninstall-Antivirus-Utility

no prev antivirus – drive was near clean
i’ll try the link provided
thanks