On my nexus 7 I have not been able to install any of the 6.0.x updates. Whenever I try I download them and when I go to install half way through my t says error and I restart my tablet and nothing changed. I have tried a reset but it did not change anything. What could I do?
Google has given out an end of life (EOL) policy, which lists different hardware and versions and their final deadline for guaranteed software updates. You can check if you can find your device listed here: https://support.google.com/chrome/a/answer/6220366?hl=en and see if the EOL time has been reached. More news on the different Nexus EOL's can be found for e.g. here: http://www.androidpolice.com/2016/06/21/google-support-site-now-lists-end-life-dates-nexus-devices/
If your device is listed, but the EOL has not been reached, you should still be able to access guaranteed google updates.
So I decided to answer my own question as I found a fix. I needed to on the computer download a program to flash my nexus to marshmallow. So I have found a guide and will post how well it works later. Guide: https://developers.google.com/android/nexus/images#razor