How to fix "Windows cannot open the folder" in Windows Explorer, WinZip, 7-Zip
Windows cannot open the folder. The Compressed (zipped) Folder is invalid.
What this error means
Windows' built-in ZIP support is strict: any damage to the index makes the whole archive "invalid".
Why it happens
- Missing or damaged central directory
- A ZIP64 archive (over 4 GB) that Windows cannot read
- The file is not really a ZIP (wrong extension)
How to fix it
- Try 7-Zip, which is more tolerant
- Upload it here for a free check of what is inside
About ZIP archive files
A ZIP archive stores each file with its own small header, then a central directory (the index) at the very end. If the end of the file is missing, tools say the archive is invalid — but every file before the cut can still be read.