Default failure to update to 4.4.4

nexus 7 16gb ,rooted and on stock running 4.4.3.

updated downloaded but cant install,i get an error. also now ,wifi wont work .

what shall i do now?

thank you for any help
Droid Dna * Droid 3 (flashed with xt883 radio for use on GSM networks) * Atrix 2 (piece of trash) *
Nexus 7(1st gen.)