Microsoft Jet 4.0 Service Pack 8 (SP8) provides the latest updates to the Jet 4.0 database engine with Windows Server 2003, and is discussed in Microsoft Knowledge Base Article 829558. Download now to get the most current updates for Jet 4.0. After you install this item, you may have to restart your computer.
Download: Jet 4.0 Service Pack 8 (SP8) for Windows Server 2003 (KB829558)
Download: Jet 4.0 Service Pack 8 (SP8) for Windows 2000 (KB829558)
Download: Jet 4.0 Service Pack 8 (SP8) for Windows XP (KB829558)
View: Microsoft Knowledge Base Article 829558
Pocket RAR at a glance:
* Pocket RAR is a version of the RAR archiver for the Pocket PC 2002
platform
* The Pocket RAR archiver is distributed as freeware. Anyone may use
this software freely.
* Pocket RAR is making smaller archives than the competition, saving
disk space and transmission time.
* Pocket RAR offers a graphic interactive interface utilizing pen
and menus. You can easily browse for archives and files using the
file- and archive management mode.
* Pocket RAR can compress, decompress and delete files in RAR & ZIP
archives.
* Pocket RAR provides advanced support for RAR archives with solid
archiving, multivolume archive support,six different compression
levels, Unicode in file names and password protection using 128 bit
AES encryption.
* Pocket RAR has a small executable size to reduce the amount of
precious Pocket PC memory occupied by the archiver.
* All advanced functions can be performed on a desktop computer using
WinRAR. Help files and install documentation are also stored on the
desktop computer.
* Pocket RAR allows for easy transfer of files between desktop computer
and Pocket PC.
* Pocket RAR features are constantly being developed to keep Pocket RAR
ahead of the pack.

It is at the core of many Microsoft programs and also some third party applications.
If you have the following then you have Jet 4.0 installed & Should Definatly Update
Visual Studio 6
Visual Basic 6
Visual C++ 6
Visual Studio 200x
Outlook 2000
Outlook XP
Outlook 2003 (BCM is SQL, but Outlook is Jet)
Access 2000
Access XP
Access 2003
Windows XP
Windows 2003 Server
If you don't have one of those, you should really update anyway (To SP7 if using 9x / NT4)
If you're using Outlook 97, 98 or Access 97 then you're using Jet 3.51 and should get Je 3.51 SP3.
As for MDAC, I would recommend that everyone update to MDAC 2.7 SP1.. I've had problems with MDAC 2.8.
MDAC is essentially a driver update, telling the system how to use database connections using Open standards.
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