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A few of my friends were having problems with the game failing to launch after the latest patch was applied. Turns out the new PSO exe files were being blocked by Windows. Here's how to fix this problem. Guide (Windows 7) ------------------------- 1. Click the Start Menu button, click the Control Panel button, then click System (NOTE: If your Control Panel is set to You will need to click System and Security, then click System) 2. Click Advanced System Settings on the left side of the window. If prompted by UAC, run as administrator. 3. Under the Advanced tab, click settings inside the performance box. 4. Click the Data Execution Prevention tab, and click Turn on DEP for all programs and services except those I select. (NOTE: You can either turn this off and try to launch the game, or if it won't launch with it disabled; enable it and add the EXE files to the exception list) 5. Click the Add... button and navigate to where you installed Ultima PSO (default location is C:\Phantasy Star Online Blue Burst) Now add all of the EXE files you see to the list. When finished, click Apply then click OK. 5b. You may need to restart your computer for the settings to apply. 6. Launch the game!