Problem with Flash drive

[TobyJimmy]

encrypting my flash drive with Bit Locker File Encryption on a friend's laptop but had to pause it and remove the flash drive.  When I connected the flash drive to my own laptop (which does not have Bit Locker installed on it), I was asked to resume encryption process, which I did.  Due to the flash drive still being accessible during encryption, I deleted some file on it. The encryption process still went on after deleting the files. But I later got a red pop-up saying  ERROR: FILE NOT FOUND  The encryption process then ended immediately.  When I removed the flash drive and inserted it again it wasn't showing in My Computer. Also there was no sound as to indicate the presence of a new usb hardware.  I want to know if the flash drive has been permanently damaged , and if not how can I access the flash drive on my laptop again.?

I have not tested the flash drive on another computer.
I have not tested another flash drive on my laptop.
Flash Drive is 32GB SANDISK CRUZER SWITCH.

[Geek-9pm]

SANDISK CRUZER SWITCH is often sold with a lifetime warranty.
Follow the instructions. It you can not get it to work again, contact the manufacturer.
www.sandisk.com

[patio]

You never mentioned how it was encrypted...
Also you may have accidently moved the tiny switch on that unit that locks the drive from access...

[Geek-9pm]

OP mentions Bitlocker
http://en.wikipedia.org/wiki/BitLocker_Drive_Encryption
It is NOT on all Windows versions.
From the above article the encryption is a form of AES.
You can also do AES from the free 7-ZIP program.
www.7-zip.org/

IMHO most users shroud avid using BitLocker unless they are are sure of what they are doing. For most of us,  7-ZIP can provide enough security for personal and small business use. And 7-ZIP is widely available, free, and is easy to use.