Program won't update, uninstall, reinstall

Hi!
I have avast free 7.0.1407 and it won’t reinstall, unistall, or update, running on a Windows 7 Home Premium.
When I try to update either the virus database or the program nothing happens.
And when I try to reinstall, or unistall it, it gives these error messages:
''Error reading product data from ‘‘C:\Program Files\AVAST Software\Avast\setup". Setup cannot continue.’’
When I click ok in this message, this one appears.
‘‘An error 0(00000000) has occoured. Last operation peformed was: spawning.’’

So is there anything I you know that could help me??
Thanks in advance

I have avast free 7.0.1407
latest is 7.0.1466

remove with this and reboot …read it all step by step before you start http://www.avast.com/uninstall-utility
install new version and reboot

did that help?

Yep! That worked!
Thanks, have a great week!