Error load language

Hi,
I have installed avast on my computer and in my account ( administrator access ) work but in secondary account ( limited access ) give me a error:

Failed to load language dll [1033\UIlangRes.dll]

Why? I used the avast uninstall tool but not changed.

The service running but the icon and tool outlook give me a error, how I can fix this error?

Computer: Windows xp sp3 Italian version.

Welcome max246

There is an Italian area of the forum:
avast!WEBforum | avast! support forums | International zone | Italiano
http://forum.avast.com/index.php?board=26.0

I think that with a secondary account that is normal.