Windows 2000 build 1964

5.0.1964.1
	Build of Windows 2000
OS family	Windows NT
Version number	5.0
Build number	1964
Build revision	1
Architecture	x86
Compiled on	1999-01-21
Expiration date
Timebomb	1999-09-18 (+240 days)
SKUs
	Server
About dialog

Windows 2000 build 1964 is a Beta 3 build of Windows 2000, which was originally found on 23 June 2015 only in the Server SKU.^[1]

It lacks a proper branding, having "2000 Server" branded in places such as the boot screen and login banners, "NT 5.0 Beta 2" branded in others such as the lanmannt.bmp and lanma256.bmp bitmaps, and "2000 Professional" branded in winver and the default Active Desktop wallpaper.

Changes[edit | edit source]

Changed the icons, hibernation and safe to shutdown screens to the versions used in the RTM.
The "Network and Dial-Up Connections" applet received another new icon, now with the computers overlapping.
The icons in the toolbar of Windows Explorer and Internet Explorer have been slightly shrunken in spacing between them.
The ver command for Command Prompt now reports the same version string as in the header rather than printing out the version number only.
The shell has been updated, with new branding and a new Active Desktop wallpaper. However, the old NT 5.0 branding is still present in a few places, like the bootloader and the "Logon Screensaver".
Windows now uses the new symc8xx.sys driver for newer models of the Symbios Logic 53C8xx line of SCSI host adapters instead of symc810.sys.
This is the first available builds to move device drivers into driver.cab.
New bugcheck codes have been added:^[2]
- A device driver has corrupted the system memory pool. (0xC5, later renamed PCI_CONFIG_SPACE_ACCESS_FAILURE)
  - This bugcheck in particular also has the modified contents of BUGCODE_PSS_MESSAGE (0x7C) after the error message.
- A device driver attempting to corrupt the system has been caught. The faulty driver currently on the kernel stack must be replaced with a working version. (0xC6, later renamed DRIVER_CAUGHT_MODIFYING_FREE_POOL)
- A kernel timer or DPC was found in memory which must not contain such items. Usually this is memory being freed. This is usually caused by a device driver that has not cleaned up properly before freeing memory. (0xC7, later renamed TIMER_OR_DPC_INVALID)

Bugs and quirks[edit | edit source]

The banner of the Configure Your Server Wizard cannot be displayed, as instead an error page takes place.
The About box of Internet Explorer 5 does not display the version number, as the "Version" string was left blank. This can also be seen in build 1965.