Asus Eee Pad Transformer TF101 - Manual (Page 5)

ASUS Transformer 
9. The firmware update process takes about 10 minutes to complete. Tap
OK to continue.
10. Your Transformer automatically reboots and starts firmware update.
11. After rebooting your Transformer, you shall see the update success
message popped up if the system has been updated successfully. Tap
OK to close the message.