Which Files to Keep After a Yonyou Database Is Encrypted: Delete These and They're Gone for Good

After a Yonyou account set is encrypted by ransomware, what determines how much can be recovered is often not antivirus software but whether you kept the right files. This article provides a checklist of files that must be preserved (data files, logs, UFSystem system database, historical backups, ransom notes and sample pairs, system and database logs), explains correct preservation methods, several actions that directly destroy recovery chances, and how to determine the recovery path after preservation.