[Q] CyanogenMod taking a long time to boot on first go......

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http://forum.xda-developers.com – Hi, I just attempted to put my first ROM on my note - CM10. I followed the rooting instructions on root galaxy note dot com (I can't post the link cos this is my first post apparently) which seems to go fine, the only difference was that once I got CWM on I just picked the CM10.zip and rebooted. It's been sitting with the CyanogenMod boot animation for 40 minutes now, I worried I screwed it up. Given I'm a noob at this and didn't make a back up is there a way for me to get a ROM back on the device that will actually boot up for me? Or have I forked it up. Any help appreciated! (HowTos)