How to delete corrupt folder?

• Look at the disk properties from Windows Explorer
• Go to the Tools tab
• Choose Error Checking
• You will need to reboot to allow CHKDSK to run at startup
• The corrupted directory will either be restored to a readable state or deleted

Alternatively, the command line approach is CHKDSK C: /B (replace C: with your drive as appropriate)

Once run, you can tidy up as you wish.