libguestfs-tools套件提供了一个基于QEMU的磁盘映像去查找这个磁盘映像中安装的Windows操作系统的具体注册表信息，甚至是进行改动（当然不安全，目前可能不成熟，可能损坏映像文件）。
这个套件目前我只在centos和redhat的虚拟化环境中找到了，具体安装方法很简单：
安装完成之后，使用virt-win-reg既可以对已经安装操作系统的虚拟机映像文件进行注册表的读取操作,不过要注意的是目前只推荐在虚拟机停止状态下获取注册表的信息，如果在启动模式下获取注册表或者修改注册表信息都可能导致虚拟机映像文件损坏。
其中win9-clone是虚拟机的名字，可以通过libvirt的virsh list –all命令查询得出，不过一定确保虚拟机已经是停止的状态，否则可能造成磁盘损坏。
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall]</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\AddressBook]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Branding]
"QuietUninstallString"=hex(1):52,00,75,00,6e,00,64,00,6c,00,6c,00,33,00,32,00,20,00,49,00,65,00,64,00,6b,00,43,00,53,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,42,00,72,00,61,00,6e,00,64,00,43,00,6c,00,65,00,61,00,6e,00,49,00,6e,00,73,00,74,00,61,00,6c,00,6c,00,53,00,74,00,75,00,62,00,73,00,00,00
"RequiresIESysFile"=hex(1):31,00,30,00,30,00,2e,00,30,00,00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Connection Manager]
"SystemComponent"=dword:00000001</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DXM_Runtime]</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DirectAnimation]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DirectDrawEx]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Fontcore]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ICW]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\IE40]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\IE4Data]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\IE5BAKEX]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\IEData]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MPlayer2]</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\MobileOptionPack]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\NetMeeting]
"RequiresIESysFile"=hex(1):34,00,2e,00,37,00,31,00,00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\OutlookExpress]
@=hex(1):00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\PCHealth]
"QuietUninstallString"=hex(1):72,00,75,00,6e,00,64,00,6c,00,6c,00,33,00,32,00,2e,00,65,00,78,00,65,00,20,00,73,00,65,00,74,00,75,00,70,00,61,00,70,00,69,00,2e,00,64,00,6c,00,6c,00,2c,00,49,00,6e,00,73,00,74,00,61,00,6c,00,6c,00,48,00,69,00,6e,00,66,00,53,00,65,00,63,00,74,00,69,00,6f,00,6e,00,20,00,44,00,65,00,66,00,61,00,75,00,6c,00,74,00,55,00,6e,00,69,00,6e,00,73,00,74,00,61,00,6c,00,6c,00,20,00,31,00,33,00,32,00,20,00,43,00,3a,00,5c,00,57,00,49,00,4e,00,44,00,4f,00,57,00,53,00,5c,00,49,00,4e,00,46,00,5c,00,50,00,43,00,48,00,65,00,61,00,6c,00,74,00,68,00,2e,00,69,00,6e,00,66,00,00,00
"UninstallString"=hex(1):72,00,75,00,6e,00,64,00,6c,00,6c,00,33,00,32,00,2e,00,65,00,78,00,65,00,20,00,73,00,65,00,74,00,75,00,70,00,61,00,70,00,69,00,2e,00,64,00,6c,00,6c,00,2c,00,49,00,6e,00,73,00,74,00,61,00,6c,00,6c,00,48,00,69,00,6e,00,66,00,53,00,65,00,63,00,74,00,69,00,6f,00,6e,00,20,00,44,00,65,00,66,00,61,00,75,00,6c,00,74,00,55,00,6e,00,69,00,6e,00,73,00,74,00,61,00,6c,00,6c,00,20,00,31,00,33,00,32,00,20,00,43,00,3a,00,5c,00,57,00,49,00,4e,00,44,00,4f,00,57,00,53,00,5c,00,49,00,4e,00,46,00,5c,00,50,00,43,00,48,00,65,00,61,00,6c,00,74,00,68,00,2e,00,69,00,6e,00,66,00,00,00</p>
<p>[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\SchedulingAgent]
@=hex(1):00,00
该命令的其他用法可以使用man virt-win-reg获取相关帮助信息，用法还是很多的哦
