Reset the default security provider in Windows XP
To reset the default security provider in Windows XP, delete the relevant registry keys in the Windows registry. To do this, follow these steps:
1. Start the computer. Press the F8 key during startup to start the computer in Safe mode.
2. Start Registry Editor (Regedt32.exe).
3. Delete the following registry keys in the Windows registry:
4. Quit Registry Editor.
5. Restart the computer.
Reset the drive letter of the system drivef
Use Registry Editor to change the drive letter of the system drive back to its original value. Edit the following registry key to change the value of the system drive:
For additional information and steps detailing the exact procedure to rename the system drive letter, click the following article number to view the article in the Microsoft Knowledge Base:
223188 How To Restore the System/Boot Drive Letter in Windows