There are a whole platter of reasons out there that can cause your computer to run slow, like viruses, spyware, malware, trojans, worms, ransomware, adware and cookies.
And one of the latest culprits is called Coinhive.
Coinhive is a script that uses your CPU (the processor in your computer) to mine the Monero cryptocurrency (similar to Bitcoin). Sites like CBS and the Pirate Bay used this service to test the possibility to run this instead of ads.
Recently the Register reported that the UFC website was found to be secretly running the Coinhive script. The actual site in question is the pay-per-view website for UFC (ufc.tv.site) that streams mixed martial arts matches.
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