help with latest version of avast home

Hi

I just loaded the latest version of avast home edition but it doesn’t start due to the error below. which i copied from the event viewer. I don’t know what this means can anyone help. I now have no virus scanner running and don’t want to change from avast

Activation context generation failed for “C:\Program Files\Alwil Software\Avast5\AvastUI.exe”. Dependent Assembly Microsoft.VC90.MFC,processorArchitecture=“x86”,publicKeyToken=“1fc8b3b9a1e18e3b”,type=“win32”,version=“9.0.21022.8” could not be found. Please use sxstrace.exe for detailed diagnosis.

Thanks
g

What veersion of Windows> Is it a legitmate copy?

Sounds like you may be missing a key windows file – have you tried a repair on the avast?

to repair… go to control panel -uninstall/remove programs - dlick on avast and select repair - then reboot computer