So, assuming you've got a restore point to work with, here's how you restore your PC to an earlier state: From the Windows 8 Start screen, type "Restore." The top result in the right-side Search panel should be "Create a restore point." Even though that's not what we're doing today, that's the choice you want to make.
It opens the Control Panel to the Systems Properties dialog's System Protection tab, shown below: You'll probably want to choose the most recent one, so that you don't lose too much in the way of new updates, programs, and settings.
Here’s a short clip on the copper-colored sheen on Tomoe River paper.
Keep in mind that the sheen of any ink can be seen if you use the right combination of ink, pen, and paper. This is a nice, rich black if you want something that’s not watery-looking for your everyday writing.
Under natural light, it’s clearly a black colored ink with blue undertones.
The ink feels quite thick to me, so it flows a bit on the dry side.
It also has some copper sheen, although the sheen seems equally distributed along the lines that I draw.
But if you do indeed want to restore to an earlier state, the most important thing to know about restoring any Windows PC is that you need something to restore it toa restore point.
To create a restore point, you can see my article How to Create a Restore Point in Windows.