I got a brand new PC today because I couldn't Bootcamp my Mac due to a shortage of disk space on its SSD. It had McAfee pre-installed on it, and, shortly afterward, I noticed a ton of performance overhead from McAfee, namely its Real-Time Scanning.
I'm a Computer Science major at a community college. From what I understand, programs can only get on a machine by:
- Downloading them from the Internet
- Being ran from the OS (they were pre-installed)
- The user made it and saved it from the machine
- A CD-ROM or equivalent media
- A flash drive or other removable storage, which fits into CD-ROM or equiv.
McAfee's Real-Time Scanning scans files on read, from what its description blurb says. Why should it scan on read, and not when the files are written on the hard drive?
One other reason why I as is due to the fact that my aunt has Norton, and I've seen it provide insight on files as they were downloaded.