I finally got it, but none of the above steps fixed it. My netbook connected to the installer no problem, but not my main PC. I resolved it by copying the core game files (Launcher.exe, WoW.exe, etc) to my main computer. It loaded no problem after that.
I did notice the Launcher.exe versions when I did this. The older version of the launcher was 22.214.171.1247. The new version on my netbook was 126.96.36.1992.
In addition, I found difference with Blizzard Downloader.exe (ver 188.8.131.522 vs 184.108.40.2062), Blizzard Updater.exe (220.127.116.1129 vs 18.104.22.16823), Repair.exe (22.214.171.1242 vs 126.96.36.1992), WoW.exe (188.8.131.5211 vs 184.108.40.20629), Battle.net.dll (220.127.116.1146 vs 18.104.22.16865), and Scan.dll (22.214.171.124 vs 126.96.36.199). The mfil/tfil files go without saying, but changing them out had no effect.
When I did this, I started by updating the mfil/tfil files. After, I copied over the files in the Updates folder. When that failed, I copied the patches over from the Data folder. And, after all that failed, I copied the core files. Only after I downloaded the core EXE and DLL files did I have success.
Blizzard, thoughts on this finding? Any chance you can review the changes between these two versions and why some are having difficulty?
Edited by Mignus on 11/23/2010 10:10 PM PST