Unendlich commas in textfeld

pls help me solve a trojan that refuses to be deleted despite my premium AVAST which was purchase for thesole pursose of getting rid of this trojan.

Each time i set the cursor inb einem Texfeld, it automatically insert series of commas non stop…ii just watch helplessly…Now i dont know what next to do I have done Avast clean up but the problem remains
Regards

If you want help, follow instructions here and attach requested logs >> https://forum.avast.com/index.php?topic=194892.0

pls help me solve a trojan that refuses to be deleted despite my premium AVAST which was purchase for thesole pursose of getting rid of this trojan.
Does avast detect a trojan? if so what does the message from avast say ... post a screenshot