How do you postpone Dell update?

Dell Update automatically downloads updates, installs them, and reboots my computer.  It doesn't even give me a heads up notification, the only way I know it updated is when my laptop finishes rebooting there's a notification in my action centre saying from Dell Update saying my system has just been updated. Is there a way to change the reboot time like you can with Windows Update? These random reboots are becoming a huge pain. I do art commissions, and when I lose hours of work due to my computer randomly rebooting, the quality of my work suffers, or I have to tell my client I need extra time.  Then I get a bad review from them saying I'm slow and incompetent, and potential customers stay away from me. Also, if you're only here to say something like "Well you should've saved your work", don't. And when I play MMOs my guildmates all give me for bailing in the middle of a raid, even though I tell them it's not my fault, my laptop reboots whenever it wants.  They're slowly coming to resent me, and I believe I'm going to get kicked out of the guild soon. Dell Update is making me lose money, customers, and friends.  If there isn't a way to control when Dell Update reboots my computer, I'll probably just sell my XPS on eBay and buy an MSI.