Marshmallow update difficulties

[AC Question]

Yesterday, I got marshmallow update for my phone HTC Desire820. But, after the download was complete, I got a message that update was corrupt. I tried again but got the same message.
Please tell me what to do.

 

[B. Diddy]

Moved to the Desire 820 forum.

 

[cr7_abhie]

but my htc desire 820 has kitkat hows it possible

 

[Shinju R]

go to settings==> about==> you can find system update their. check for update .you will get a notification of updates.........