Failed upgrade, now stuck in recovery mode
I would first try updating the phone with official Kies software.  Download it from here, install it on your computer, and run it.  The program should walk you through the upgrade process.

If the above fails, you may have to go the hard way and follow instructions from here.  This post from xda-developers forum has links to various region-specific ROMs, as well as instructions for flashing it via 3rd-party tools:


  Installation:
  - Download appropriate ICS ROM, and extract the .tar file from the Zip.
  - Download Odin, open it.
  - Select PDA tab and point to ROM file. Leave Re-partition, pit, CSC, Phone tab unchecked.
  - Switch off device, put it in download mode (hold down Vol Down + Home + Power buttons)  .
  - Completely close Kies and any Anti-Virus applications if running
  - Connect device to PC
  - "ID:COM" port should turn yellow
  - Now click Start
  - After reboot, you will see screen showng android updating, then will install some application.  


*Important Note:
All the links and instructions I provided are for the Samsung Galaxy Note international model - N7000.  If you have a different, carrier-specific variant (e.g. US AT&amp;T's SGH-I717 or South Korean SHV-E160x models), you will need to search for Kies and/or stock ROM version applicable to your specific model number.