Try to disable hardware acceleration in Firefox.

• Tools > Options > Advanced > General > Browsing: "Use hardware acceleration when available"
• https://hacks.mozilla.org/2010/09/hardware-acceleration/

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
• https://support.mozilla.org/kb/how-do-i-upgrade-my-graphics-drivers

How can I do this if I never get the Firefox window?

You can use one of these to start Firefox in Safe mode:

• On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
• On Mac, hold down the Options key while starting Firefox
• Help > Restart with Add-ons Disabled

• https://support.mozilla.org/kb/Safe+Mode

You can also try to boot the computer in Windows Safe mode with network support (press F8 on the boot screen) as a test to see if that works.

Thanks cor-el. That fixed it. Goodbye IE/Opera!

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