Epson AcuLaser C8600 Reference Manual page 120

Note:
You do not have to install the additional driver for Intel
Windows 2000 (or XP) only, because that driver is preinstalled.
Do not select additional drivers other than Intel Windows 95
or 98 (and Me) and Intel Windows NT 4.0 or 2000. The other
additional drivers are not available.
5. When a prompt appears, insert the CD-ROM that comes with
your printer in your CD-ROM drive, then click OK.
6. According to the message, type the appropriate drive and
folder names in which the printer driver for clients is located,
then click OK.
Depending on the client's OS, the displayed message may
differ.
The folder name differs depending on the OS being used.
Client's OS
Windows Me/98/95
Windows NT 4.0
When installing drivers in Windows 2000/XP, "Digital
Signature is not found." may appear. Click Yes (for Windows
2000) or Continue Anyway (for Windows XP) and continue
installing.
118 Setting Up Your Printer on a Network
Folder Name
\<Language>\WIN9X
\<Language>\WINNT40