Why? You get what you get.
From various Microsoft sources...
In safe mode, you have access to only basic files and drivers (mouse,
monitor, keyboard, mass storage, base video, default system services, and no
network connections).
When you start the computer in Safe mode, your video adapter resolution and
colors may temporarily change in such a way that the windows and icons on
your screen become very large, which may make it difficult for some windows
to fit. This behavior is dependent on the type of video adapter that you are
using.
Enable VGA Mode
Starts using the basic VGA driver. This mode is useful when you have
installed a new driver for your video card that is causing Windows not to
start properly. The basic video driver is always used when you start in Safe
Mode (either Safe Mode, Safe Mode with Networking, or Safe Mode with Command
Prompt).
Enable VGA Mode: This option starts Windows in 640 x 480 mode by using the
current video driver (not Vga.sys). This mode is useful if the display is
configured for a setting that the monitor cannot display.
Note Safe mode and Safe mode with Networking load the Vga.sys driver
instead.
The VGA driver supplies basic video functionality only.
VGA mode starts Windows normally with a single exception. Your video refresh
rate and resolution are both reset to 640x480 and 60Hz respectively. This
should display correctly on any VGA monitor, allowing you to change the
display settings to something more compatible with your hardware.
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Hope this helps. Let us know.
Wes
MS-MVP Windows Shell/User
In