Trojan virus

Hi,
after running the full scan i found a trojan virus. The problem is that the file affected by the virus is read-only and therefore I can not delete / move it and thus in each subsequent scan the file is always on the computer and so i always find it.
what can i do to move it to quarantine or delete it?

Attach your basic logs. (MBAM, FRST and aswMBR…!!)
Instructions: https://forum.avast.com/index.php?topic=53253.0