Easiest way to achieve what you're after is to flash the latest RUU for your phone and receive the OTA/OTAs from there.
Hi,
I do have exactly the same issue on an untouched U11 single Sim. HTC support is not able to help me.
Current software version is 2.33.161.11 of a German Vodafone Rom with CID VODAP102.
So I am desperately looking for OTA to from 2.33.161.11 to 2.33.161.12 and then to 3.36.161.1 or a RUU for 3.36.161.1.
Any help is more than welcome.
@breno_campolina: have you tried to clear the cache of the those two system apps: update and download manager (Apps -> 3 point menu -> show system apps)? You might also want to try to download the update within the safe mode. I have tried all of this without success.
Cheers
Elendiir