Hi, I need quotation for 1 PC only

General
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Hi, I need quotation for 1 PC only

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First, I’m an Avast user and not an Avast Team member.

There is Avast Premium and Avast Ultimate with can be purchased as a single user or multi user option.

It is somewhat difficult to give a detailed answer not knowing your needs other than just for 1PC.

So I did this search for you:
Should I choose Avast Premium or Avast Ultimate - comparison.

Once you have decided which you need you could then do a search for the best price as there are also legitimate third party resellers who might be able to offer a better price (based on the volumes they sell).
Care has to be taken when choosing a legitimate source PC Pro is one that comes to mind
Should I choose Avast Premium or Avast Ultimate - compare.

This is one such source:

There are lots of options there and one for Avast Premium for 1 PC for 1 year for what is a very good price.