Could you review latest deepin 15.1 https://www.deepin.org/?language=en
Zorin 10 is based on ubuntu 15.04 so no inherent problems but zorin 10 will receve update only till january 2016( ubunt 15.04 +9 months)
Could you try adding ppa:kubuntu-ppa/backports and updating just update one more time? Any differance?
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