I used Avast free anti-virus earlier and I used to get a notification stating that File system shield not ON. Even if I try turning it ON it was of no use. Yesterday I purchased a license for 1 year. Still I am not able to resolve this issue. My order ID is 15376327942 dated 21 Aug 14.
Dear you’re in the wrong section
please next time wrire here https://forum.avast.com/index.php?board=2.0
anyway try a repair of avast:
from add Remove programs, select ‘avast! Anti-Virus,’ click the Change/Remove button and select Repair, click next and follow, then reboot.