Some tips, just in case they help. When disabling apps, you can generally ignore the warning that other apps may break. Do not disable Google play services, tho

Some tips, just in case they help. When disabling apps, you can generally ignore the warning that other apps may break. Do not disable Google play services, though. Also, go into the account settings and make sure sync is turned off for everything, you can sync manually when needed. Finally, disable auto-update in the play store. Google apps update frequently but will generally continue to work for quite a while if you refuse those updates.