将Win10字体和窗口布局还原为系统默认

最近突发奇想，想试一下曾经的Windows系统——Windows 98，用VirtualBox安装，虚拟硬盘格式选择VHD。安装的时候，安装程序里有一项功能，就是扩展主题，这激起了我的兴趣。

可谁知道，这个扩展主题的功能，并非只为Windows 98而“设计”。在Windows 10下挂载Win98的VHD硬盘后，我找到了扩展主题所在的文件夹（C:\Program Files\Plus!），运行其中的主程序“themes.exe”，结果——

该程序居然能在Windows 10下运行！

但是，能运行并不一定代表能生效吧。于是，手贱的我，选择了一个主题后，点击了“确定”……悲剧发生了！

标题栏变窄，系统界面字体变小，字体全改为宋体，同时桌面背景消失！简直让我一时间难以相信这是事实。

界面变味的Win10的确很影响使用，随即，我开始寻求解决方案。然而，像我这样的情况，在百度上根本不可能找到解决方案，能找到的所谓“解决方案”，基本都是针对Win7和Win8的——这两款系统还保留了自定义系统界面元素大小和字体的入口，但在Win10中都早已悉数移除。同时，Win10设置中所谓的主题切换，只更改配色和壁纸，不更改界面内容，因此也不能够指望用恢复默认主题来解决。

根据以往的经验，Windows 2000及其以后，无论哪一个版本，主题修改都只会对当前用户生效。我重新启用系统中的管理员账户“Administrator”，登录进去，发现主题设置均为系统默认的正常值，这样问题解决就容易得多，问题就仅仅局限在我的账户里。

那么，管理上述界面元素的注册表项在哪里？答案是：

HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics

其中，主键HKEY_CURRENT_USER为适用于当前用户的注册表键。在注册表编辑器中打开这个路径，你就会发现，其中包含了界面元素的宽高、字体大小、字体名称等选项，如图所示：

知道了注册表路径和主题的适用范围后，你就能轻而易举地推导出这个问题的最终解决方案了。登录到Administrator账户（或其他界面正常的账户），打开注册表编辑器，浏览到上述键，然后点击【文件】→【导出】，导出为一个注册表文件（*.reg）。返回出现问题的账户里，双击该文件，将其导入注册表，重新登录之后，故障就完全解决了！

附：默认主题设置的注册表文件。可直接将该文件复制下来，保存为reg格式文件（如“恢复主体默认设置.reg”）使用。（提取自Win10 17134版本。）

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Control Panel\Desktop\WindowMetrics]
"BorderWidth"="-12"
"CaptionFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,00,\
  00,00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,\
  00,20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"CaptionHeight"="-336"
"CaptionWidth"="-336"
"IconFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,00,00,\
  00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,00,\
  20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"IconTitleWrap"="1"
"MenuFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,00,00,\
  00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,00,\
  20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"MenuHeight"="-288"
"MenuWidth"="-288"
"MessageFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,00,\
  00,00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,\
  00,20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"ScrollHeight"="-252"
"ScrollWidth"="-252"
"Shell Icon Size"="32"
"SmCaptionFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,\
  00,00,00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,\
  74,00,20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"SmCaptionHeight"="-336"
"SmCaptionWidth"="-336"
"StatusFont"=hex:f1,ff,ff,ff,00,00,00,00,00,00,00,00,00,00,00,00,90,01,00,00,\
  00,00,00,01,00,00,05,00,4d,00,69,00,63,00,72,00,6f,00,73,00,6f,00,66,00,74,\
  00,20,00,59,00,61,00,48,00,65,00,69,00,20,00,55,00,49,00,00,00,00,00,00,00,\
  00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00
"PaddedBorderWidth"="-60"
"AppliedDPI"=dword:00000078
"IconSpacing"="-1128"
"IconVerticalSpacing"="-1128"
"MinAnimate"="1"