Microsoft's most successful program

A bright blue screen wich pops up out of nowhere at the worst time possible and implies that your computer has encountered an error wich oftenly leads to the system freezing, crashing, and causing you to restart your computer.

A screen that made you commit suicide thanks smart people at Microsoft. Now made Extinct by Windows XP, but that has its own problems.
A close relative to the BSOD is the General Protection Fault or
Critical Error

An annoying screen that windows users see at least once a day that kills everythig you were doing at the time

Something that happens after every half hour on a Microsoft Windows 98 or lower. Get an XP, dorks!

1) A tried and true method for ensuring people need to buy new hardware after smashing their keyboard and/or mouse into their monitor. This never resolves the problem but is highly satisfying if you can afford it.

2) Mandatory, unexpected, frequent and infuriating intermission for Windows users.

3) Herpes for your PC, flare ups are painful and hard-booting may temporarily relieve symptoms. Frequent system maintenance can help if you don't flare up during, which gets exponentially harder to do. No cure, working as intended.

An error message on a blue screen and uses the MS-DOS font. This happens when major or "fatal" errors occur. In some cases you can press any key "to continue," but sometimes pressing CTRL+ALT+DEL may be required, and in rare cases you will have to power off the computer due to the keyboard not responding or getting a "System halted._" message.