我在 Windows 10 上运行 MikTeX 2.9，今天以管理员身份更新了我的 MikTeX 软件包，之后又以普通用户身份更新。在上次更新期间，MikTeX 控制台和正在运行的所有其他程序都停止响应，无法再正常工作，因此我不得不按下电源按钮。重新启动后，我无法再编译任何 LaTeX 文档。当我尝试打开 MikTeX 控制台时（无论是设置、更新或软件包模式，无论是管理员还是用户），我都收到错误Not a file name database file (wrong signature)。
所以我想卸载并重新安装该程序，但即使在卸载时（无论是卸载 uninstall.exe 还是 Windows 中的控制面板），我还是会遇到同样的错误，甚至无法再卸载它。所以我从程序目录中删除了 MikTeX 文件夹，并使用 CCleaner 清理了我的计算机和注册表。
然后我尝试重新安装 MikTeX。乍一看，这似乎可行，但在安装结束时，MikTeX 再次失败，并出现以下错误：
Not a file name database file (wrong signature).
Info: path="C:\ProgramData\MiKTeX\2.9\miktex/data/le\1756f6ade37d5f870f23c05a7f81e257.fndb"
我尝试为所有用户（管理员模式）和单个用户安装几次，但总是出现相同的错误。我关闭了防病毒程序和防火墙，并在被要求即时安装软件包时选择了“先询问我”。这也没有帮助，仍然是相同的错误。我已经尝试了几个小时，但现在毫无头绪。Windows 昨晚进行了更新。也许这与此有关？
据我所知，安装已基本完成。程序目录中有我卸载前的所有文件夹和 .exe 文件。我不明白为什么它不起作用以及错误意味着什么。这是最后一个 .log 文件：
initializing setup service...
starting installer...
Loading package database...
starting package maintenance...
installation directory: "C:\Program Files\MiKTeX 2.9"
package repository: C:\Users\FRAUSP~1\AppData\Local\Temp\mik75003
visiting repository C:\Users\FRAUSP~1\AppData\Local\Temp\mik75003...
repository type: local package repository
loading lightweight database...
lightweight database digest: 1e7eacdbd2c588b9dabb6b8f9cd115ab
going to install 10756 file(s) (216 package(s))
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updating package definition directory ("C:\Program Files\MiKTeX 2.9\tpm\packages")...
installed 3263 package definition files
visiting repository C:\Users\FRAUSP~1\AppData\Local\Temp\mik75003...
repository type: local package repository
loading lightweight database...
initexmf "--common-install=C:\Program Files\MiKTeX 2.9" --set-config-value=[Core]SharedSetup=1 --admin "--log-file=C:\Program Files\MiKTeX 2.9\miktex/config\uninst.log" --disable-installer --verbose:
Not a file name database file (wrong signature).
Info: path="C:\ProgramData\MiKTeX\2.9\miktex/data/le\1756f6ade37d5f870f23c05a7f81e257.fndb"
Source: Libraries\MiKTeX\Core\Fndb\FileNameDatabase.cpp
Line: 99
Sorry, but "MiKTeX Configuration Utility" did not succeed.
You may want to visit the MiKTeX project page, if you need help.
An error occurred:
source file: Libraries\MiKTeX\Core\Process\Process.cpp
source line: 166
message: The executed process did not succeed.
info: fileName="C:\Program Files\MiKTeX 2.9\miktex/bin/x64\initexmf.exe", exitCode="1"
<<<Cancel? Yes!>>>
请帮助我让 MikTeX 再次工作。
答案1
我设法解决了这个问题。
解决方案 1： 正如 RobtAll 在上面的评论中指出的那样，MikTeX portable 可以作为一种解决方法。
解决方案 2：
根据 Ulrike Fischer 的建议，我向GitHub MikTeX 问题跟踪器。显然，该错误是由损坏的文件名数据库文件引起的，我被建议删除它们。昨天我完全删除并卸载了 MikTeX，找不到任何剩余的文件。但是，当我fndb在系统上开始搜索时，它实际上在不再存在的目录中找到了五六个 .fndb 文件。由于我file could not be found在尝试删除它们时收到错误消息（），因此我运行 CCleaner 并再次清理了系统（包括注册表）。即使在那里，仍然出现了一些本不应该存在的 MikTeX 文件和路径。之后我重新启动了电脑，从网站下载了基本的 MikTeX 安装程序，并再次安装了 MikTeX（单用户版）。这次它没有任何错误。
我仍然有点困惑，因为我昨天用 CCleaner 清理了几次系统。但是现在基本的 MikTeX 以及更新软件包和编译我的文档又可以正常工作了。所以我断定这是由于这些 .fndb 文件造成的。