如果删除整个windows注册表会发生什么？

Windows注册表是一个应该保持足够独立的地方，但只是为了争论，如果你删除了整个东西会发生什么？今天的超级用户问答帖子讨论了满足读者好奇心的可能性。...

如果删除整个windows注册表会发生什么？

Windows注册表是一个应该保持足够独立的地方，但只是为了争论，如果你删除了整个东西会发生什么？今天的超级用户问答帖子讨论了满足读者好奇心的可能性。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

截图由维基百科提供。

问题

超级用户读者SkYWAGz想知道如果整个Windows注册表被删除会发生什么：

I have been wondering what would happen if I deleted the entire Windows registry (using the following code for instance). Would my PC stop working?

cd %TMP%
reg query HKCR> RegTest.txt
reg query HKCU>> RegTest.txt
reg query HKLM>> RegTest.txt
reg query HKU>> RegTest.txt
reg query HKCC>> RegTest.txt
@pause && cls
for /f “delims=” %%I in (RegTest.txt) do reg delete “%%I” /va /f

如果删除整个Windows注册表会发生什么情况？

答案

超级用户贡献者danielb和StW为我们提供了答案。首先，丹尼尔B：

You cannot delete the root nodes since they do not physically exist. You can, however, delete their contents via Regedit (as opposed to reg).

Regedit hangs as soon as I try to delete HKLM\SYSTEM. After resetting the VM (because I am lazy), I get the following screen (the operating system is Windows XP):

007Ys3FFgy1gpfcc4wb9kj30hd05k74k

(Translation: “Windows could not start because the following file is missing or corrupt: \WINXP\system32\config\SYSTEM”)

So yes, deleting stuff from the registry will absolutely positively kill Windows. And unless you have a backup, restoring it is impossible.

接下来是StW的回答：

Windows stores a lot of critical information in the registry, which is loaded (at least a part of it) during an early stage while booting. If you remove this information, Windows will be unable to find and load critical system files and thus be unable to boot.

Such critical information is the list of device drivers needed for booting the system. This may include:

Disk drivers (Floppies, Hard-Disks, CDs, USB Devices, …)
Bus drivers (IDE, SATA AHCI, …)
File system drivers (FAT, NTFS, …)
…

However, by default Windows stores a backup copy of the registry. If you have enabled System Restore, you can find such copies in the (hidden) System Volume Information Folder inside the root folder of the system partition. Additionally, even if you do not have System Restore enabled, Windows saves a backup copy of the registry in %WINDIR%\System32\config\RegBack\.

You can manually copy the backup files into %WINDIR%\System32\config\ to restore the registry data.

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