I saw this pop up this morning, which is fine. The opening sentence could be improved. It reads
'avast! antivirus is used by more than 75 million people world-wide, but is based in the beautiful city of Prague, capital of the Czech republic.'
The use of the word 'but' is not correct in this context, and the sentence needs switching around to get the most important idea first:
'Avast! antivirus is based in the beautiful city of Prague, capital of the Czech Republic. Avast! is used by more than 75 million people world- wide.'
I'm not picking on the translator, it's just that I was an editor among other things for thirty years.
No charge
-Bob