NSX upgrade attempt fails pre-check with: "Extracting upgrade bundle failed. Try again with correct upgrade bundle"
NSX 4.x
Corrupted .pub/.mub file used for upgrade or pre-check.
Re-download or re-transfer .pub or .mub file, ensuring MD5 checksum matches properly.
To verify the checksum :
certutil -hashfile <.pub or .mub file> MD5