开机提示验证错误
如果满足下列任一条件，就会发生此问题：
? Windows XP 中默认的安全提供程序已更改。
? 系统驱动器的驱动器号已更改。
据报告，安装 Dell Assistant 软件的 Dell 计算机存在此安全提供程序问题。
注意：任何更改默认安全提供程序的软件都可能导致此问题，而不是仅限于 Dell 计算机或 Dell Assistant 软件。
重置 Windows XP 中的默认安全提供程序
要重置 Windows XP 中的默认安全提供程序，请删除 Windows 注册表中相关的注册表项。为此，请按照下列步骤操作： 1. 启动计算机。启动时按 F8 以便在安全模式下启动计算机。
2. 启动注册表编辑器 (Regedt32.exe)。
3. 删除 Windows 注册表中的下列项：
HKEY_USERS\.DEFAULT\Software\Microsoft\Cryptography\Providers
HKEY_USERS\S-1-5-20\Software\Microsoft\Cryptography\Providers
4. 退出注册表编辑器。
5. 重新启动计算机。
重置系统驱动器的驱动器号
使用注册表编辑器将系统驱动器的驱动器号更改为原始值。编辑下列注册表项以更改系统驱动器的值：
HKEY_LOCAL_MACHINESYSTEMMountedDevices
有关详细介绍重命名系统驱动器号的准确过程的其他信息和操作步骤，请单击以下的文章编号以查看 Microsoft 知识库中相应的文章：
223188 (http://support.microsoft.com/kb/223188/) 在 Windows 中如何恢复系统/启动驱动器的驱动器号
老外的解决办法：
When you start Windows XP and log on, your receive the subject error. When you press OK, you are returned to the Log On to Windows dialog.
NOTE: If you perform a System Restore, the problem may persist.
This behavior will occur if you are missing the %SystemRoot%System32secupd.dat file and / or the %SystemRoot%System32oembios.dat file.
To resolve this problem:
1. Restart your computer and press F8 to start in Safe Mode.
2. Log on.
3. Right-click My Computer and press Manage.
4. Open the Event Viewer.
5. Check the System event log by using the View menu to Filter for an Event source of Windows File Protection since the last time you successfully logged on. You should be able to locate the files that could not be found during logon, probably as Event ID 64005.
6. Using another Windows XP computer, preferably as the same service pack and hotfix level, copy the missing files. If you don't have another Windows XP computer, you may be able to Expand the missing files from the Windows XP CD-ROM.
7. Restart your computer normally.
8. You may have to reapply the latest service pack and hotfixes, perform a SFC /SCANNOW and also check for viruses and other malware.
