Hi there! I understand that Sudoku.com is just showing a spinning circle and not loading games on your WebKit browser in Windows 10. Let's get this sorted out.

First, to help narrow things down:
- Are you using the Sudoku.com website or the Sudoku.com app?
- Have you tried refreshing the page or restarting your browser already?
- Is your internet connection stable?
- Have you cleared your browser cache recently?

Here’s a simple step-by-step approach to try fixing the issue:

1. Refresh and Restart
Reload the Sudoku.com page to see if that helps. If not, close your WebKit browser entirely and reopen it before going to the site again.

2. Clear Browser Cache
Sometimes accumulated cache can cause loading problems. To clear cache in WebKit browsers on Windows 10:
- Go to the browser settings.
- Find the section for clearing browsing data.
- Select to clear cached images and files (you do not need to clear cookies or passwords unless you want).
- Reload the Sudoku.com website.

3. Check Internet Connection
Ensure your network is stable. Try opening other websites to confirm. If other sites are slow or not loading, a network reset might help.

4. Disable Browser Extensions
Some browser extensions, especially ad blockers or script blockers, can interfere with game loading. Try disabling them temporarily and reload Sudoku.com.

5. Try Incognito/Private Mode
Open a private browsing window in your WebKit browser and load Sudoku.com there. If it loads, the issue may be related to cache or extensions.

6. Update Browser
Make sure your WebKit browser is up to date, as older versions may have compatibility issues.

If these steps don’t resolve the loading spinning issue, it might be related to cached game data (in the case of the app) or a temporary server glitch. Clearing app cache is suggested if you’re using the Sudoku.com app. Although you mentioned a browser, I want to be thorough in case this helps.

If you want, I can guide you on clearing cache or resetting the app if applicable. Also, please let me know if you are seeing any error messages or if the spinning happens continuously without progress.

Are you happy to try these steps? Let me know how it goes or if you need more detailed guidance!