I have seen some reports, on here, of failing updates with the Dell Support Assistant. But for the 8500 the problem is Dell does not (officially) support Windows 10 on this model, although it may work OK in Win 10. There are only Win 7/8/8.1 drivers on the Dell downloads for this model. The H77 chipset driver listed on the downloads has a Dec 2015 date.
Best suggestion I can give you is to uninstall the Dell Support Assistant and use updates provided with the Win 10 updates.
Dell forum member since 2002
Dell Inspiron 15 - 5577 Laptop
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