You won't loose any data if you just reflash ur OS a.k.a. rootfs another a.k.a. firmware also known as FW and referred to fiasco you will need windows preferably XP: A) 1. Go to http://tablets-dev.nokia.com/nokia_N900 2. There are clear instructions on how to find and enter your imei 3. Throw the EULA in a trash can and click I agree 4. Download RX-51_2009SE_20.2010.36-2_PR_COMBINED_003_ARM (this or the one specifying your region) 5. Download Maemo flasher 3.5 6. Install Maemo flasher 7. Copy RX-51_2009SE_20.2010.36-2_PR_COMBINED_003_ARM (this or the one specifying your region) to Maemo flasher's directory (e.g. C:/program files/maemo) B) 1. Open maemo flasher from start ----> all programs ----> maemo 2. Type: flasher-3.5 -F <FIASCO image> -f (RX-51_2009SE_20.2010.36-2_PR_COMBINED_003_ARM in this case) 3. Hit enter then plug in your usb cable to the computer then while off open ur N900's keyboard and press u and keep holding it 4. after some seconds a cmd window will pop out showing flashing status probably for 5 mins $. After it finishes close everything and disconnect usb p.s. why don't they just provide a one name instead of several a.k.a's