Microsoft Operating Systems by Base Install Size

"Typical", "default", or "Install the most common components" setting used on install.
Networking and/or multimedia stacks were installed on older operating systems.
All OS versions installed in VMware virtual machines.
VMware Workstation chose default settings, such as RAM size, based on OS type.
Windows 2.x and 3.x include the size of the underlying DOS install.
Release date is for base operating system version--not service packs.

Operating System	Base Install Size	Release Date
Dos 3.3	698 KB	1987
Dos 5.0	2.1 MB	1991
Dos 6.22	5.9 MB	1994
Windows 2.03 (Dos 5.0)	3.5 MB	1988
Windows 3.0 (Dos 5.0)	7.1 MB	1990
Windows 3.1 (Dos 6.22)	11.2MB	1992
Windows 3.11 (Dos 6.22)	21 MB	1993
Windows 95 (CD - OSR2) USB Support	88 MB	1995
Windows NT 3.51 Workstation	?	1995
Windows NT 4 Workstation SP1	353 MB	1996
Windows 98 (Second Edition)	219 MB	1998
Windows ME	492 MB	2000
Windows 2000 Professional	991 MB	2000
Windows XP Home 32-bit SP3	1.99GB	2001
Windows XP Professional 32-bit SP3	2.20 GB	2001
Windows XP Professional 64-bit SP1	3.19 GB	2005
Windows XP Professional 64-bit SP2	5.34 GB	2005
Windows Vista Starter 32-bit SP1	7.39 GB	2006
Windows Vista Home Basic 32-bit SP1	7.88 GB	2006
Windows Vista Home Basic 64-bit SP1	?	2006
Windows Vista Home Premium 32-bit SP1	8.30 GB	2006
Windows Vista Home Premium 64-bit SP1	?	2006
Windows Vista Business 32-bit SP1	7.81 GB	2006
Windows Vista Business 64-bit SP1	12.8 GB	2006
Windows Vista Ultimate 32-bit	8.37 GB	2006
Windows Vista Ultimate 64-bit	?	2006
Windows Vista Enterprise SP1 32-bit	7.74 GB	2006
Windows Vista Enterprise SP1 64-bt	10.1 GB	2006
Windows 8 Professional 32-bit	7.45 GB	2012
Windows 8 Professional 64-bit	9.55 GB	2012
Windows 8.1 Professional 32-bit	7.27 GB	2013
Windows 8.1 Professional 64-bit	9.33 GB	2013

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