‘‘fatal error: current avast! installer is not trusted by avast! self defense module. try to launch the installer again’’
This is the error… i dont really know what to do… All i did was delete AVG. And i seem to cant even download any other antiviruses softwares… Please help ^.^
I tried reinstalling too ofc. Nothing changed 
Thank you !
I imagine you mean uninstalled AVG. Anyways you need to apply AVG removal utility tool. Choose the right tool according to your AVG program version and Windows bit ( 32/64 bit ) and download it to your desktop:
http://www.avg.com/us-en/utilities
Download a fresh copy of avast!. Also to your desktop:
http://files.avast.com/iavs9x/avast_free_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_pro_antivirus_setup.exe
http://files.avast.com/iavs9x/avast_internet_security_setup.exe
http://files.avast.com/iavs9x/avast_premier_antivirus_setup.exe
Be sure to have your lincense handy if running a paid version.
Apply AVG removal tool. Reboot your system and install avast!