please answer me
What avast version are you using 4.8 or 5.0 ?
avast is a resident on-access antivirus and is designed to run on start, it isn’t an on-demand scanner.
Why is it that you want to do this ?
i use the 5 version, I want to close it because I want to try another antivirus without uninstalling avast
ps: i use google translate because I’m italian 
You shouldn’t do that resident AVs are designed to load low level drivers and they are outside of any windows startup function.
So uninstall is the safest option as low level driver conflict between two resident anti-viruses could lock up your system iin a worst case scenario that could happen at boot and lock you out of windows normal mode boot.
to be honest I have the internet security, and I will use a “time stopper” to stop the trial period and I need that since I have to remove avast automatic
Em…KeKKo961 it isn’t a good thing that you are doing by cracking a program you know…why don’t you use the free one instead of cracking the internet Suit version.
God bless!!!
I think you may come unstuck in trying to freeze time of any of the trial products. Aside from any legal/moral issues in trying to circumvent trial periods in paid software. Alwil provide a free anti-virus solution (and there are any number of free firewalls).
So to effectively try to use a trial version to avoid payment is taking revenue from Alwil software, if you like the product buy it if you can afford it then use the free options suggested.
ok not crack it will go free when it ends and put a good firewall
Outpost Firewall Free
http://free.agnitum.com/