I have a problem

Viruses and worms
1 
I have installed avast, but my pc goes extremaly slow and i have made a complet analisis.

This analisis detect a virus, but allwais when the analisis is at 45 % the avast shut down or the pc block

i would like to have some help

2
I have installed avast, but my pc goes extremaly slow and i have made a complet analisis.
what antivirus did you use before avast? did you uninstall it before installing avast?
This analisis detect a virus, but allwais when the analisis is at 45 % the avast shut down or the pc block
follow this guide and [b]attach[/b] the logs......not copy and paste http://forum.avast.com/index.php?topic=53253.0

AdwCleaner
Malwarebytes
OTL
aswMBR

3

I find that Avast is relatively light. The other reply suggested you post some data and that seems a good starting point.