此时将需要CMG SDE密钥恢复

我在戴尔PRECISION M4700笔记本电脑上运行Windows 7。我允许更新我的操作系统。重新启动后，由于给定驱动程序的更新，我得到了蓝屏。经过一番搜索后，我完成了这些说明。我主要打字

error c0000001 loading backup
error c0000001 loading cache, attempting


error c0000001 loading alternate
error c0000001 loading alternate, attempting

So I got this error: CMG SDE Key Recovery will be required at this point
Booting continuing in xx seconds

我该怎么做才能解决这个问题？

当您有戴尔PC /笔记本电脑时，请尝试以下步骤恢复出厂安装（如果没有其他帮助）：

要将计算机还原到原始出厂安装，请按照下列步骤操作：

Turn on the computer, after the Dell logo press F8 key repeatedly until the
    Advanced Boot Options menu (Advanced Startup Options).
In Advanced Boot Options, highlight Repair Your Computer and press Enter.
Click Next and logon to the administrator account in the computer.
Click Dell DataSafe Restore and Emergency Backup and DataSafe Options.
Choose Restore without preserving new or changed file. Click Next to continue.
Choose Yes and click Next to continue.
Progress status will appear. Click Restart to initiate the restoration process.

http://yourbusiness.azcentral.com/return-dell-precision-factory-default-19839.html