解决方法如下：
如上图，电脑用着用着，左下角的Cortana小娜搜索栏无端端变成了白色，看着忒难受，找了很多地方都说解决方案是改语言，然后重启之后改回来。
方法确实是有效，可是过了一小阵子，重新用搜索功能的时候又变成了白色。
1. 将[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\WhiteSearchBox]的Value字段从1改成0 ；
（搜索栏主体已经不是白色，但搜索栏上端边缘还有一小圈白色。）winwin7.com
2. 将[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderThickness]的Value字段从1改成0。
之后重新启动Windows资源管理器或电脑即可恢复小娜搜索框颜色
还有一个方法：应对注册表丢失的问题
1、复制以下蓝色代码到记事本中，然后另存为reg文件；
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0]
"UILanguage"="zh-Hans-CN"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\CloudAgent_GlobalShell]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\CloudAgent_LaunchApplication]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\CloudAgent_Settings]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\CloudAgent_ShareFile]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\CloudMusic]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\DeviceManagementEnabled]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\ProactivePrefetchIntervalMinutes]
"Value"=dword:000002d0
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\PWILOActivityUploadEnabled]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxAutoSuggestedForegroundColor]
"Value"=dword:ff999999
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderColor]
"Value"=dword:bbffffff
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderColorInDarkMode]
"Value"=dword:bbffffff
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderColorShouldMatchTaskbar]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderColorShouldMatchTaskbarInDarkMode]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderOnlyAtRest]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderOnlyAtRestInDarkMode]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderOnlyOnTop]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderOnlyOnTopInDarkMode]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderThickness]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxBorderThicknessInDarkMode]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxIbeamPointerOnHover]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxText]
"Value"="在这里输入你要搜索的内容"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyBackground]
"Value"=dword:00000014
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyBackgroundInDarkMode]
"Value"=dword:00000014
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyForeground]
"Value"=dword:0000003c
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyForegroundHighlight]
"Value"=dword:0000003c
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyForegroundHighlightInDarkMode]
"Value"=dword:0000003c
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyForegroundInDarkMode]
"Value"=dword:0000003c
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyHighlight]
"Value"=dword:0000001e
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyHighlightInDarkMode]
"Value"=dword:0000001e
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyTextLight]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyTextLightHighlight]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyTextLightHighlightInDarkMode]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxTransparencyTextLightInDarkMode]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchBoxUseSearchIconAtRest]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\SearchButtonUseSearchIcon]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\ShowSearchGlyphLeftOfSearchBox]
"Value"=dword:00000001
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\ShowSubmitButtonRightOfSearchBox]
"Value"=dword:00000000
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\WhiteSearchBox]
"Value"=dword:00000001
"Feature"="CAC01CT"
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Search\Flighting\0\WhiteSearchBoxInDarkMode]
"Value"=dword:00000001
2、双击导入注册表，之后重启Windows资源管理器即可解决。
Win10小娜搜索框的颜色变成白色怎么办?不要着急，按上面小编分享的两个方法操作就可以解决了。