Hmm, the only thing I can think of is https://forums.opera.com/topic/31561/solved-website-loading-lasts-lond-with-cpu-load-on-cryptsvc. But, that's kind of an older issue. But, one thing to try is to create a new user account on Windows and test with it. If things work fine in the new user account, then you might be running into that issue or some other issue with your normal user account.
Do more on the web, with a fast and secure browser!
Download Opera browser with:
- built-in ad blocker
- battery saver
- free VPN