The computer is very slowed down until the installation the new version Avast

Avast Free Antivirus / Premium Security
1

The computer is very slowed down until the installation the new version Avast. What is going on? I do not understand it. The use of the processor, RAM and net is low (normal)
Windows XP SP2, 1024 DDR2, 2.0GHz Athlon 64

2

Please, do not post twice the same… just double the help effort.
Besides, this is the Server Edition forum.

Follow: http://forum.avast.com/index.php?topic=28595

3

this is the Server Edition forum.hehe~!! ;D ;D ;D ;D