if this is happening at system start, your pc is updating and your hard drive may be nearly FULL so it is terribly bogged down by that. you have no option but to wait. if this is while browsing, then the web site you are looking at is full of advertisements and its slow, so slow, it never complete the page loading. navigate to a more interesting website. consider doing a DISK CLEANUP and look at the % free space for your drive. you may need to start deleting things.

something is trying to run in the background

open the task manager and see what processes are running and post the details

You need to call an Indian tech support scammer