Process Explorer ? click here
Though it depends on your OS, antivirus/antispyware software. If you have XP and its indexing service running (though I was always under the impression that it operated 24/7 when enabled) that could be the cause.
OnePlus 5 review
Alice Saey's mesmerising animation for Dutch singer Mark Lotterman
iPad Pro 10.5in (2017) review
Comment booster votre iPhone ?