: Encountering this string in a text editor or a system log is usually normal behavior for document processing.
: Modern Office files are actually zipped collections of XML files. If you rename a .xlsx to .zip and open it, you can see these internal components. __Colup_FKzip
: It usually only becomes visible if you are using forensic tools, advanced data recovery software, or opening raw XML code. 🛠️ Common Occurrences : Encountering this string in a text editor