With your preloaded there are 2 files located in the
Windows\System directory they are called OEMLOGO.BMP and OEMINFO.INI.
The OEMLOGO.BMP is the graphic you are interested in changing or
removing. If you make a new 16 bit bitmap, a white background color
will be made transparent by Windows. The OEMINFO.INI can be opened
with a text editor and modified to your liking or removed. This is a
example of what the OEMINFO.INI could contain
Manufacturer=XYZ Computers Inc.
Line1="Technical Support: 1-888-555-5555"
Line2="Technical Support Fax: 1-800-555-5556"
Line3="E-Mail to: firstname.lastname@example.org"
Line4="WWW page: http://www.xyz.com"
Line6="Technical Support is 24 Hours a Day, 7 Days a week"
You may also want to check out this program. It's
only good for 10 days unless you register but it allows you to greatly
customize Windows. WinBoost