• Determining MSDeploy vs. ZipDeploy
• Determining what's causing the file to be locked
• Preventing files from being locked
• Safe deployment using Slot
• Run from a package
• Stopping the site (or slot) before deploying
• For msdeploy, try enabling 'App Offline'
• For msdeploy, there is another option to rename locked files
• Check if files have the read-only attribute
• Specify ReadOnly application