Lenovo ThinkVantage Client Security Solution 8.3 - Manual (Page 77)

Appendix C. Using Client Security Solution on a reinstalled
Windows operating system
If your Windows operating system installed with Client Security Solution has been reinstalled, to use Client
Security Solution on the newly installed Windows operating system, you need to clear the installation data of
Client Security Solution and reinstall Client Security Solution.
The best practice is:
1. Uninstall Client Security Solution from the current Windows operating system.
2. Restart the computer.
3. Clear the following data in the registry:
• [HKEY_LOCAL_MACHINE\SOFTWARE\Lenovo\TVT Common\Client Security Solution]
• [HKEY_LOCAL_MACHINE\SOFTWARE\Lenovo\Client Security Solution]
• [HKEY_LOCAL_MACHINE\SOFTWARE\Lenovo\Logs]
• [HKEY_LOCAL_MACHINE\SOFTWARE\IBM\Security\Debug]
4. Clear the data related with Client Security Solution in the C partition. It is recommended to search the
data in the whole C partition, with the option of viewing all hidden files in the File Option window
enabled. The result can be found in, but not limited to, the following locations:
• C:\Users\All Users\AppData\Roaming\Client Security Solution
• C:\Users\%USER%\AppData\Roaming\Client Security Solution
5. Clear the security chip in BIOS Setup Utility and activate the security chip by doing the following:
a. Shut down the computer.
b. Turn on the computer and press F1 to enter BIOS Setup Utility.
c. Select Security.
d. Press Enter and select Clear Security Chip.
e. Press Enter and select Yes to clear encryption keys.
f. Select Security Chip and press Enter to select Active.
Note: If you do not want to set Client Security Solution into hardware TPM mode, set the security
chip to Disabled.
6. Restart the computer and reinstall the Client Security Solution program.
Note: When you change Client Security Solution installation mode from software emulation mode to
hardware TPM-based mode, or after clearing the security chip, Client Security Solution will try to recover
existing data when it detects the TPM change, and will fail because the encrypted data cannot be decrypted
by new TPM data. In this case, Client Security Solution will fail to be launched.
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