Windows 7 - Can deleted files be recovered on a bitlocker enabled device?

I received a 2 gb olympus sound recorder which I was asked to restore to normal fuctionality, and restore some mp3s that were presumably recorded on it.

The file system appears to be intact, so I can read from it, but there are two noticeable changes to the device.
First, it seems to have been infected with a version of the RECYCLER virus, which turned all the folders into links which point to the virus itself.
One of those folders are thought to contain the mp3 file in question.
Second, the device seems to have been bitlocker enabled, but it does not need any encryption key.

Now, I don't know, in what order did these events happened; I only need a confirmation, that no data can be recovered once deleted, either before or after bitlocker is enabled.

there's a chance you can recover the mp3s
you need to rely on professional file recovery tool to get them back. A popular one is Asoftech Recovery. This tool can deep scan your computer and recover your lost files back without requiring extra skills. Here is the steps might be helpful to you:
1. Download this program on your compute. here is the link: Photo Recovery: Restore your lost photo
2. Install and start the program, select the drive where your lost files located, click Start. Now the scanning process will start to search the deleted files. After a while you will then get a list of recoverable files.
3. Press Recover to perform full recovery.
hope this helps..cause the files are infected too.

Thank you.
Turns out, the virus did not delete these files, it only made them invisible, so when the bitlocking event happened, those "hidden" files were also encrypted, and did not get lost.
Hurray!

btw. what I wanted to know is the details of the bitlocker file handling mechanism for a definitive answer.

BitLocker Drive Encryption in Windows 7: Frequently Asked Questions

hope this helps!

I wanted to go further, but thanks anyway. This thread is closed.

well uhm sorry!