Bobbin Winder won't release

It appears to be a known problem and is probably a broken spring.

https://www.google.com/search?q=viking+1+sewing+machine+bobbin+winder+won%27t+stop

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There is a small rubber that rubs against the hand wheel inside the machine. It is called a tire. Yours is in need of replacement. There is also a spring that keeps tension on the bobbin winder but it probably isn't the problem.

The bobbin sits on a bobbin holder for winding. To initiate winding, the winder leaver should be pushed toward the bobbin on the holder.
If the bobbin is over-winding, the winder leaver needs to be rotated so that the section pointing towards the bobbin is closer. This can be done by gently rotating the winding leaver by hand, remember gently. It will not need much rotation, so do not overturn ... most of all be gentle. If it does not budge, the screw in the middle of the winder lever may be loosened and the winder leaver rotated. Make sure to tighten the screw when finished.
This should get the bobbin comfortably full. If the bobbin still continues to over-wind then the sensor underneath may need attention by you local technician. Do not attempt to open your Viking 1 as it may cause extensive damage and.will also null all warranties
Let me know how you go. Cheers.

The bobbin winder may need a new bobbin tire. Does the bobbin winder move over like normal?

The bobbin may be stripped, or the bobbin winder might be stripped; try it with a different bobbin, to rule out the bobbin being the issue; if that doesn't work, look closely at the bobbin winder to see if it has been damaged. You may be able to adjust it's shape with a pliers

How do you get the top off

If the winder is not moving either there is a worn part on the winder rubber, or, the winder iteself may have seized up becuae a lot of people do not realise that the spindle has to be oiled because of its high speed.

It should just pull off of the winder shaft. There is a small spring that sticks out from the shaft to hold the bobbin in place (at least on my wife's Viking which is a different model number than yours). Is there a release button somewhere near?

Winding too tight;
Whenever your bobbin won’t come off any Viking, Designer 1 included, it’s because it wound too tight. This is how you know. It went on easy! To get it off, don’t pry, slowly unwind all thread, it will change shapes and let go of the bobbin winder. My favorite way to wind a bobbin on a Viking is to thread the machine through the needle and go under the foot then up to the bobbin winder (it has to be under the foot or it winds too tight. If it still winds too tight, lay your thread down instead of standing it up, the weight of the thread can increase tension on the winding process also check that you use a spool cap as large as or slightly larger than your spool. If it still winds tight. I’ll explain what bad thread can do.

Test your thread quality to start, thread your machine and LIFT the presser foot (this opens the tension disks). Pull your top thread straight back. If you feel no tension no mater how much thread you pull, your thread is good. If that your machine passes that test (tip: always check your thread this way when you thread your machine)

My Viking Rose bobbin winder wont release my bobbin. This is the second time this has happened with the same bobbin, and I got it off the first time by gently manipulating the bobbin. It was full of thread so I decided to use it and then dispose of the empty bobbin. Well, you can imagine what happened! When it was empty, I, of course, forgot and put it right back on the winder. What do I do?