1.  What Are Fatal Exception Errors
http://support.microsoft.com/?kbid=150314

2.  From W98 ResKit:

A virtualization driver (VxD) is a 32-bit, protected-mode driver that
manages a system resource, such as a hardware device or installed
software, so that more than one application can use the resource at the
same time. VxD refers to a general virtualization driver; the x
represents the type of device driver. For example, a virtualization
driver for a display device is known as a VDD, a virtualization driver
for a timer device is a VTD, a virtualization driver for a printer
device is a VPD, and so forth.

Windows 98 dynamically loads VxDs -albeit only those that are needed at
any given time are loaded into memory. In addition, the new VxDs do not
require all of their memory to be page-locked, thereby further
increasing the available memory in the system.

VxDs support all hardware devices for a typical computer, including disk
controllers, serial and parallel ports, keyboard and display devices,
and so on.

While the VxDs dynamically support device drivers, the virtual device
keeps track of the status of the device for any application that uses
the specific device. Within the Windows 98 environment the ability to
switch between multiple applications is commonplace. Each application
being used can interrupt the use of a device being used by another open
application. Because this interruption can lead to problems with the use
of an application trying to access the device, the virtual device checks
and manages the state of the device for applications. Furthermore, the
virtual device ensures that the device is in the correct mode of
operation whenever an application continues. Although most virtual
devices manage hardware, some, such as an MS-DOS device driver or a TSR
program, manage only installed software. Such virtual devices contain
code to emulate the software or ensure that the software uses data that
applies only to the currently running application. Also, VxDs are often
used to improve software performance.

3.  It is not significant--it means that the system should reboot;
however, it is "hard" frozen and requires the reset button.

4.  When you get an error message, copy it down verbatim so you can
research it or post it verbatim to the newsgroups.  Sometimes there will
be a details button with an error message and, if so, that will contain
the message with the significant information.

SEARCHING FOR INFORMATION:

Microsoft maintains a knowledge base of articles on various subjects
here:  http://support.microsoft.com/default.aspx?pr=kbinfo

When you define a search, do it on all products initially.  If you get
too many results, you can cut back on the number of results by searching
on a particular product.  The trick to finding information is to provide
enough details so you get what you want but not use so few details that
the amount of articles are staggering.  And, if you use too many
details, you might miss what you are looking for.  Only experience in
conducting searches will tell you how many details is just right.

Often you can find what you need by enclosing an error message in quote
marks; however, be careful not to include too much.  For example, here
is an error message:

IEXPLORE caused an invalid page fault in module KERNEL32.DLL at
0137:bff798fb.

If you search on this error message with it enclosed in quotes, the
message will have to appear verbatim in the KB article in order to get a
hit.  Quite often the KB article will list the article like this:
IEXPLORE caused an invalid page fault in module KERNEL32.DLL at memory
address.  If you use the entire message within quotes, you will not get
a hit because "0137:bff798fb" in the search criteria will not match
"memory address" listed in the article.  So, in this instance, your
search criteria including quote marks would be:  "IEXPLORE caused an
invalid page fault in module KERNEL32.DLL"

You can use this same technique to search the Google search engine
archives   <http://groups.google.com/groups>.   Include the info within
quotes and you might get a little better info if outside the quotes, you
include:  MVP