Anyone from Kocaso, or anyone who owns one of these please jump in and correct me, please!
I suggest first trying the toll-free help for Kocaso: 1-866-777-0079. They are open M-F, 9:30am-6pm EST. Follow exactly the help instructions from that person first! Ignore the rest of this!
Do you know what your son did to induce the error--if anything? Do you still have the manual? Have you tried soft and then hard reset?
Use your PC/Laptop/Mac--not a tablet--to navigate to these links and downloads.
I've done some searching: Manual--Download from this link and open the PDF file with Adobe Reader on Windows. (If you don't have Reader installed, the most current version is a free download at Adobe.com.)
Firmware Upgrade: Their manual doesn't appear directly to indicate how to perform a hard reset without upgrading firmware. Telephone support should instruct well about that, though. See the manual on page 13--that's likely your tablet's problem! That refers the reader back to "Should I perform a firmware update?" on page 12.
I hope that firmware update isn't required: It may prove very risky--perhaps making your tablet useless.
Note the screen picture on page 9 of the manual: "Backup and reset"--if you can navigate to that, click navigate further in the menu to "Factory Data reset" (that's what my Android 4.0 tablet indicates, anyway--it's likely the same wording). Execute, (and, click "Yes, etc.") if possible: It likely isn't possible, is it?
Here's the firmware update site for the 1070 models: The procedure is somewhat involved, yet not impossible. Actually, two versions of the 1070 tablet exist--1070A and 1070B. You need to determine which one is your's. Definitely click and read "Serial Number Checklist.txt to help determine which firmware update to use. It appears somewhat ambiguous with one model. Again, telephone support ultimately should prove correct here, in your case.
Yet again, talk to a person at Kocaso first, always ignoring all of this, if possible!
I'm making a guess here: Note step 2 of the "Firmware Update Instructions.
"Turn off the tablet."
Then "Press the Volume + button of the tablet and keep it pressed. "
That point in the process likely should offer an option for factory reset, given that you can't navigate your tablet's "Settings" menus. Navigate on that screen and execute--clicking "Yes," or otherwise affirm.
Try to get in touch with the company! Online, they provide a form in 'Contact Us"--use that in place of calling, if necessary.