QuicklookPI is part of a legitimate Mac feature called Finder. However, it seems that some shady adware developers are abusing the name of legitimate features to disguise their intrusive software. For example, many macOS users report that QuicklookPI consumes significant hardware resources, or is being reported as threatening by security products for Mac.
If you have any reasons to suspect that QuicklookPI is involved in shady practices then we certainly advise you to run a reputable macOS security product to check for the presence of adware, hijackers or Potentially Unwanted Programs (PUPs). Failing to remove QuicklookPI is unlikely to result in hazardous consequences, but you may end up experiencing some of the undesired effects that the aforementioned software may cause. For example, you may have your browser's settings modified without your approval, or you may end up seeing more ads than usual while browsing the Web.
As mentioned earlier, the best way to make sure that you will not be bothered by fraudulent instances of QuicklookPI is to use a reputable anti-malware product, as well as avoid interacting with suspicious files.
Use SpyHunter to Detect and Remove PC Threats
If you are concerned that malware or PC threats similar to QuicklookPI may have infected your computer, we recommend you start an in-depth system scan with SpyHunter. SpyHunter is an advanced malware protection and remediation application that offers subscribers a comprehensive method for protecting PCs from malware, in addition to providing one-on-one technical support service.
Why can't I open any program including SpyHunter? You may have a malware file running in memory that kills any programs that you try to launch on your PC. Tip: Download SpyHunter from a clean computer, copy it to a USB thumb drive, DVD or CD, then install it on the infected PC and run SpyHunter's malware scanner.