Hello, how can I buy only for 1-2 month’s?
Avast Free Anti Virus requires no “timed subscription”. It’s free
As far as Pro/ AIS/ and Premier, I don’t believe that’s possible,
Here:https://www.avast.com/for-windows
Want to buy what (given that you have posted in the General Forum) ?
Yeh I assumed if was not Anti virus the OP would confirm David
Antivirus, my bad, sorry
Hope the info I provided was helpful
Then why it show’s 36£ year, and 2,99£ month?
Where are you seeing that pricing?
How you open avast app on laptop it show’s you the price, but I can’t select to buy for 1 month, only 1 year
That’s correct you can’t buy 1 month.
What Avast are you using now?
The only product available on a monthly basis that I’m aware of is SecureLine which is a VPN offered from Avast.
“Then why it show’s 36£ year, and 2,99£ month”? (Post #6)
Yes, this is obviously not for Avast Anti virus
Edit: A screenshot would help
…
Your screenshot is showing pricing for Avast Secureline VPN not Avast Anti virus.
Bob3160 has stated that the VPN is the only product sold by monthly subscription.
And its ok for laptop? And how can i buy it?
It is just an example of what it effectively costs per month, for Antivirus Versions you can’t purchase anything less than a year.
Your (massive 
) image shows what you are billed for ‘Billed as £35.88 / Year’
Other than for the Avast Secureline VPN, the exception as has been mentioned.
You have said here tat you wanted Antivirus.
Secureline VPN is not Antiviris, so it is not applicable to your immediate need.
Suggest you use free version of Avast Antivirus if you only want it for 1 or 2 months.
I’m not sure exactly what the OP is wanting to buy/use. However it seems the info for either has been provided.