Windows versions
Entry type color code - Differences between 95 and 98 - Windows 95/98/ME users
Windows 98 users - Windows 95B users - Windows versions
In order to know which entry is supported by which version(s) of Windows, have a look at the index.
Entries starting with No have their own index called noindex in the table of contents.
Top Entry type color code
Orange : REG_SZ entry
Green : REG_DWORD entry
Blue : REG_BINARY entry
Purple : REG_EXPAND_SZ entry
Red : REG_MULTI_SZ entry
Top Differences between 95 et 98
There seem to be few changes between the Windows 95 registry and the Windows 98 registry. However, a few modifications have been made in order to optimize the operating system's performances.
Changes in the registry
The shell uses less memory space in real mode and in protected mode caching has been improved. Those 2 factors are supposed to enable a quicker system start.
Changes in the operating system
The Windows 98 registry is also more reliable than the Windows 95 registry insofar as the operating system automatically scans it for errors and uses ScanReg to check and repair it. Thus, a backup of the registry is made once a day (see Backup section).
Real mode and protected mode
There are 2 modes in which a processor can allocate memory. In real mode, programs are not protected from one another, their memory space is limited to 1Mb and they use 16-bit segmented addresses. In protected mode, the processor protects the memory area allocated to a program from other programs, programs have 4Gb of memory space and use 32-bit linear addresses.
Top Windows 95/98/ME users
To find out precisely which version of Windows you are using, see the System Properties \General tab. You will see something like :

Microsoft Windows 95
Version 4.00.950 B

which indicates you are using
Windows 95B OSR 2.0 or OSR 2.1.

  At the MS-DOS prompt, you can also type :

Ver /r

You will see something like :

Windows 95. [Windows 4.00.1111]
Revision A
DOS is in HMA

which means you are using Windows 95B OSR 2.0 or OSR 2.1 [4.00.950B] or Windows 95C OSR 2.5, both shipped with MS-DOS 7.10.

Top Windows 98 users
In order to see whether your system has been upgraded to Service Pack 1, see the list of programs installed in Control Panel \Add/Remove \Install/Uninstall. If you can see the Windows 98 Service Pack 1 item in the list, you are using Windows 98 SP1 4.10.2000.
Top Windows 95B users
In order to see whether your system has been upgraded to USB for Windows OSR 2, see the list of programs installed in Control Panel \Add/Remove \Install/Uninstall. If you can see the USB Supplement for OSR2 item in the list, you can use USB devices provided you have USB ports on your machine.
Top Windows versions
Windows 95 4.00.950   Windows 95 original version, dated 11 July 1995, launched 24 August 1995
Windows 95 4.00.950 A   Windows 95 original version with Service Pack 1 or OSR 1, additional drivers, dated 21 December 1995
Windows 95 4.00.950 B   Second version of Windows 95 with Service Pack 2 or OSR 2.0 or OSR 2.1, FAT32, IE3, APM 1.2, MMX, infrared support, DirectX 2.0, Direct 3D, ActiveMovie. USB supplement can be added
OSR 2.0 or OSR 2.1 ? Check your Kernell32.dll version :
  Kernel32.dll version 4.00.1111 : OSR 2.0
  Kernel32.dll version 4.03.1212 : OSR 2.1
Windows 95 4.00.950 C   Second version of Windows 95, with OSR 2.5, includes OSR 2.0 updates as well as USB, AGP, IE4, sometimes DirectX 5.0
Windows 95 + IE4.x   Some registry entries will work in Windows 95 provided Internet Explorer 4 is installed on your machine
Windows 98 4.10.1691   Windows 98 beta version
Windows 98 4.10.1998   Windows 98 original verison
Windows 98 4.10.2000   Windows 98 with Service Pack 1
Windows 98 4.10.2222   Windows 98 SE (Second Edition), last version supporting real mode dos
Windows 98 4.10.2222 A    Same as previous
Windows ME 4.90.3000   Windows ME (Millenium Edition) original version, virtual mode dos, IE5, DirectX 7.0
Windows NT 4.00.1381   Windows NT 4.0 Workstation or Server, IE4
Windows 2K 5.00.2195   Windows 2000 Professional, Server or Advanced Server, IE5, DirectX 7.0, WMP 7.0


© Franck Kiechel 2000-2001