My creative zen rebuilds the library almost evry time it turns on.

SOURCE: freezes at "rebuilding library"

I just found this on another website and it seems to be working so give it a shot


Listen!!!!! Anyone having problems try this before you blame the product. Turn off player........remove battery.......hold on button ON and put battery back in while still holding the power button on. When power comes on release the power button. You should now see a clean format and re-boot screen. Use the clean function two times. After the second time go down to reboot and should be fine. Worked for me. The Zen Micro Photo is a sweet mp3 player. Dont blame the product for something YOU most likely did. This will fix 99% of your players problems

SOURCE: Zen Xtra 40 GB

http://us.creative.com/support/downloads/

and download the firmware for you version,.

SOURCE: Keeps Freezing

http://serviceman.site88.net/index_files/MP3Players.htm

SOURCE: Creatve Zen freezing at rebuilding

Try using a different computer or a different USB cable. It is possible that the Windows mass storage driver is having issues. You may also want to try to download the newest software from Creative and install that. You may also want to try to plug it in and then press the reset button and see if it detects it when it restarts.
Also try putting an SD card into the expansion slot and see if it detects it as as mass storage device.
If none of the above work and it is still under warranty (less than 90 days) I would send it to Creative for repair or replacement. If it is out of warranty, Creative's repair costs may not make it worth fixing. When my out of warranty player needed fixed they were going to charge 125 USD and I only paid 200 USD for it about a year earlier. When it finally got to be too hard to deal with I opted for an iPod. Granted they are more expensive but the support is better and the warranty is 1 year.

Cheers and best wishes.

SOURCE: Creative Zen Freezes on Rebuilding

My Zen locked when I turned it on. It wouldn't play the track the screen was on so I pressed the reset button and turned it on again. It was then still locked on the same track so I tried turning it off which then froze as it was shutting down. After another reset it went through the rebuild screen then locked again. I then used the above fix (pin in reset, then hold play and power switch down). Taking me into the kind of bios screen I formatted the contents. Then added my library again. It's now working fine.
This is the second Zen I've had because the first one had the same problem so I took it back without trying to fix it. Both times the problem occured when I had my Zen plugged into my car stereo auxiliary jack whilst switching the ignition on in my car. I can't understand why this would cause the problem but I'll avoid doing that in future.