That reads as if something is hogging all of your laptop's resources. The most common cause is anti-virus software getting itself stuck in a loop. (Microsoft's own products, such as Windows Defender, are notorious for it but I've known other programs, such as AVG and Norton, to exhibit the same problem). The solution is to uninstall your anti-virus program and then to reinstall it (or, possibly better, to install something else).
It could also be worth running Malwarebytes Anti-Malware if you've already got it installed. If not, install and run AdwCleaner instead. (It's from the same company. It's got a more basic interface but it avoids getting involved in a trial of 'premium' product:
https://www.malwarebytes.com/adwcleaner/