Urit, wellcome to forums. Mike’s suggestion was very good. Unfortunatelly, your system did not react 
Why don’t you make a full clean (see the section Cleaning & Tunning Tools of this forum. There you will find some ‘cleaning’ applications. I suggest, BeClean.
If that directory was empty (C:\Documents and Settings\username\Configurações locais\Temp) try empting the others (C:\WINDOWS\Temp_avast4_ or something like that). :-\