update is getting halted after sometime, inspite of repeated attempts.please help.
Perform a repair of avast and check if it solved the problem.
If not, perform a clean installation of the latest version.
Repair Avast:
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
https://www.avast.com/faq.php?article=AVKB204
If Repair doesn’t fix the problem, try the following:
Clean Install of Avast:
https://goo.gl/4Ptzkf