How does anti-malware software quarantine malware?

Answering to you comments,fifty

I installed the free product Windows Advanced Care and lists somewhere in the neighborhood of 4000 problems with my computer files, which seems correct. It quarantined all of this which I wondered how a computer program quarantined something? Does he copy the file with the malware missing pieces and give the former backup file name, or what? Nearly

. His most as he cut the malware code of normal files and pasta in a file.