Hi Peter,
Thank you for choosing to post your question in the Microsoft forums.
You are unable to copy/paste files in Windows 8, I understand the inconvenience.
Method 1:
This issue may occur if the System files are corrupted I would suggest that you run the SFC scan. Follow the steps.
a.
Press the
‘Windows + X’ key on the keyboard.
Select Command Prompt (Admin)
b.
In the Command prompt window, type**"sfc /scannow"**
Method 2:
Refresh Windows 8 and check. Follow the steps.
a.
Swipe in from the right edge of the screen, tap Settings, and then tap Change PC settings.
b.
(If you're using a mouse, point to the upper-right corner of the screen, move the mouse pointer down, click Settings, and then click Change PC settings.)
c.
Under PC settings, tap or click General.
d.
Under Refresh your PC without affecting your files, tap or click Get started.
e.
Follow the instructions on the screen.
Note:
The apps that came with your PC or you installed from
Windows Store will be reinstalled, but any apps you installed from other websites and DVDs will be removed. You'll find a list of the removed apps on your desktop after refreshing your PC.
If the issue persists then let us know and we will provide more methods.