Windows 10: Takes 15 seconds before scroll bars and links become usable

When I switch to a new page--either from the local disk or from the internet--the image appears quickly but then it typically takes 15 seconds before the links or scroll bars become active. For example, after the 'Start new thread' appeared, it then took about 15 seconds before it was functional, i.e. before clicking it would do anything.

If this a fairly common problem? What's the usual cause? How do you suggest I try to find the cause?

(Note that since this problem happens regardless of whether the page was retrieved locally or from the internet, I don't believe this is a network problem.)

Windows 10 Pro Version 20H2

:)

 

TPU review scroll bar

I was wondering if there was any specific reason the buttons to scroll down the list of reviews was stuck in the bottom left-hand corner? Whenever I want to read reviews, I always have to move my cursor and aim it at a small arrow that scrolls the reviews... I'd suggest that instead of making the arrows small and in a corner, it would be better placed to the sides of the review bar.

Something like this (yes, I know it's crappy but it took 5min to make):

 

Scroll bar keeps jumping to top of scroll bar

Hi,

There are several factors why you are experiencing this issue and that's what we are going to find out. Before we proceed, may we know the following:

• Any changes made on the computer prior to this concern?
• What troubleshooting steps have you tried so far?
• Are you experiencing this issue on all scroll bars available on your computer?
• Can you send us a screenshot with what you are experiencing when using the scroll bar?
  Note: Please do not include any personal information.

 

Scroll bar keeps resetting in Windows File Explorer.

For some reason, when I'm browsing a long list of files, if I stop moving my scroll wheel for a few seconds, the scroll bar in the file explorer jumps back up to the very top. Which is annoying when I'm browsing a folder that has hundreds of files in it.
This only happens in the file explorer. Any suggestions?