如果刪除整個windows登錄檔會發生什麼？

Windows登錄檔是一個應該保持足夠獨立的地方，但只是為了爭論，如果你刪除了整個東西會發生什麼？今天的超級使用者問答帖子討論了滿足讀者好奇心的可能性。...

Windows登錄檔是一個應該保持足夠獨立的地方，但只是為了爭論，如果你刪除了整個東西會發生什麼？今天的超級使用者問答帖子討論了滿足讀者好奇心的可能性。

今天的問答環節是由SuperUser提供的，SuperUser是Stack Exchange的一個分支，是一個由社群驅動的問答網站分組。

截圖由維基百科提供。

問題

超級使用者讀者SkYWAGz想知道如果整個Windows登錄檔被刪除會發生什麼：

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

如果刪除整個Windows登錄檔會發生什麼情況？

答案

超級使用者貢獻者danielb和StW為我們提供了答案。首先，丹尼爾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):

(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.

接下來是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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