Open up your task manager and keep an eye on your memory use. If it's hitting 3.5gb CK is running out of memory and crashing.
Usually occurs while loading a lot of exterior cells consecutively.
Thanks for your response. I checked my task manager and it reaches about 700 MB when loading the standard Skyrim and Update Master Files (I haven't been able to get much farther than just opening one interior cell).
When I first open the program and do nothing to it, it crashes after about 4 minutes. The task manager reported only 154.3 MB when it crashed.
Have you done...
1, CK work with only vanillia master loaded (I.E. make 5 minutes worth of vanilla edits without using any SKSE nor any other mods as a test).
2, NOT on line with steam (make 5 minutes worth of vanilla edits as a test).
3, Not while Skyrim is running (make 5 minutes worth of vanilla edits as a test).
4, While in Safemode (make 5 minutes worth of vanilla edits as a test).
Open SkyrimPrefs.ini then found Audio branch and change bEnableAudio to 0.