If you are running windows 2008 server with IIS 7 then you may have noticed a problem with your PHP apps such as Wordpress or Joomla when you try to perform updates.

The problem occurs when the old files are deleted, the delete fails to complete leaving the files/folders in a locked state and you are then unable to do anything with them at all.

this problem has been plaguing me fore a few months and solution has been to use a file unlocker tool to release the lock.

I have recently found the cause for this to be the Wincache extension for PHP, you can find more details and a fix HERE.

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