Nobody reports such a problem as described herein.
A guess would be that the browser (or just an add-on or setting in the browser) is hogging resources (such as interrupts, caching, cpu clock cycles, network io or something).
You could use the built-in performance monitoring function of Windows to concurrently view the load effect on critical resources (cach, cpu, disk accesses, page file accesses, etc.) when the scrolling problem is being made to occur.
Simultaneously view the processes list in the task manager to see where the action is occurring and as well how much to try to trace the problem to a specific application.
If you have java enabled in the browser then also try disabling it as well as disable all add-ons, auto updates, search engines, etc. in settings. These are easily disabled & selectively re-enable-able via toggles. (Dont forget to close & restart the browser for the effects to take.)