After a while, avastsvc.exe uses all ram avaiable. During the computer scan, it happens the same. I´ve uninstalled it, installed it, fixed it, ran avastclear, also antyspyware e antimalware, did a boot scan... no change. Even with all other softwares closed, no change. It´s the last version of the free version running on a windows 7.
I´ve placed a print screen attached.
Thanks a lot guys!