ESET mirror update tool

Software Name: ESET NupDown Tools
Version: 3.5.0.0
Supports all ESET versions
Language: Simplified Chinese
Type: ESET (NOD32) database download tool
License: Freeware
Suitable for 32/64-bit systems: All Windows systems

Features:
1. This tool supports ESET virus database download tools and server setup.
2. Downloads virus databases from the ESET official website to the local computer. The ESET update address is the local virus database path, enabling ESET software virus database updates.
3. One-click activation of the HTTP server function, allowing the local virus database to be used by other computers on the intranet or for port mapping for use by other users on the external network.
4. A new local configuration file, setup.ini, allows users to customize configuration parameters to meet different user needs.
5. Uses the official website’s domestic update source by default, providing faster download speeds for domestic users.
6. This tool requires wget.exe. Usage (Running Directory)

7. This tool and virus database can be stored in any folder (configure according to setup.ini; see post #2 or the attachment for usage instructions).

8. For convenient full functionality, use with the Jingrui ESET special version.

Simplified Usage Instructions:

1. In ESET’s advanced settings, point the update address to the folder where this tool runs (e.g., C:\ProgramData\ESET\eset_upd; if HTTP service is enabled, point to http://127.0.0.1:2221/).

2. Exclude the folder where this tool runs in ESET’s advanced settings.

3. Refer to the attachment for detailed instructions.

4. If you still don’t understand, you can download and install the Jingrui integrated NupDown tool special version (easy installation).

PS:
1. NupDown may be deleted by some antivirus software such as ESET (including Windows Defender). Before use, temporarily disable your antivirus software or exclude the program’s running folder.

2. See post #2 for setup.ini file configuration instructions (or usage instructions in the attachment).

3. To slim down the virus database, delete the dll folder to clean up the accumulated virus database from the old version, and then update it again (keeping nupdown.exe, wget.exe, and setup.ini will allow it to run normally; setup.ini will be automatically generated after deletion). Version 3.0.0.0 no longer generates accumulated virus database update files.

January 17, 2026 Update

1. Fixed incremental download bug

2. Added more right-click functions, allowing selection of the corresponding version (server options for remote loading)

3. Added IsDiffUpdate=1 incremental download switch, used in conjunction with LocalVersion=local virus database update time

4. The configuration file now retains one private server enterprise version download by default.

5. Fixed some bugs in the right-click menu.

6. Added support for HTTPS download addresses.

7. The configuration file is saved in UTF-8 encoding.

January 18, 2026

Update: Improved incremental updates for older .dat versions.

2026.1.19

Updated and optimized ID authentication logic, differentiating between official server and private server authentication mechanisms, resulting in more efficient program operation.

Updated 2026.1.25:
Fixed issue where startup programs were not being loaded correctly in the configuration file.
Fixed incremental update download logic.

Updated 2026.1.29:

Fixed incremental update issues.

软件名：ESET NupDown Tools
版本：3.5.0.0
支持 ESET 所有版本
语言：简体中文
类型：ESET(NOD32) 数据库下载工具
授权：免费版
适合32/64位系统：所有 Windows

功能说明：
1、此工具支持ESET病毒库下载工具和服务器架设
2、通过ESET官网下载病毒库到本地，ESET更新地址填写本地病毒库路径实现ESET软件病毒库更新
3、一键开启http服务器功能，可将本地病毒库用于内网其他计算机使用，也可做端口映射用于外网其他用户
4、新增本地配置文件setup.ini 可用户自定义配置参数，满足不同用户需求
5、默认采用官网国内更新源，国内用户下载速度更快速
6、工具需配合 wget.exe 使用（运行目录）
7、此工具及病毒库可存放于任何文件夹（依据setup.ini自行配置，使用方法见2楼或附件说明）
8、配合精睿ESET特别版本可方便使用完整功能

使用方法简易流程：
1、ESET软件高级设置将更新地址指向此工具运行文件夹（比如 C:\ProgramData\ESET\eset_upd，如果开启http服务则指向http://127.0.0.1:2221/）
2、ESET软件高级设置排除此工具运行文件夹
3、可参考附件中的使用方法具体操作
4、如果还是搞不明白，可下载精睿集成NupDown工具的特别版进行安装（傻瓜式安装）

PS:
1、NupDown会被ESET等部分杀毒软件删除（包括Windows Defender），使用前先暂时关闭杀毒软件，或者提前排除程序运行文件夹。
2、setup.ini 文件配置说明见2楼（或附件中使用方法）
3、病毒库瘦身可删除dll 文件夹清理老版本病毒库积累，重新更新（保留nupdown.exe、wget.exe、setup.ini可正常运行，setup.ini删除后会自动生成），3.0.0.0版本已不会产生病毒库累计更新文件。

2026.1.17更新
1.修复增量下载bug
2.新增更多右键功能，可选择对应版本（服务器选项远程加载）
3.IsDiffUpdate=1增量下载开关，配合LocalVersion=本地病毒库更新时间使用
4.配置文件默认保留一个私服企业版下载
5.修复右键菜单一些bug
6.支持https下载地址
7.配置文件保存为UTF-8编码
2026.1.18

更新 完善 dat 老版本增量更新

2026.1.19

更新优化ID认证逻辑，区分官服和私服认证机制，程序运行更加高效

2026.1.25更新
修复配置文件中开机启动未被程序正常加载
修复增量更新下载逻辑

2026.1.29更新
完善增量更新问题

Remark: Prebuild with downloaded defination update. Post to a single page for easy maintain.

Release to be use with ESET release.

Disable Defender / ESET before install

Thanks to figoshen + yztcsn + 麦田守望者 and vc52 tool release

6 January 2026 – Fix downloading for x86 windows and disable auto update app

13 January 2026 – Using my own trial key generated… Cat and mouse mode. If update fail you still are protected please keep that in mind.

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