1、清楚KEY

2、Shut down Kaspersky.
3.Run regedit, and remove the following registries. (Key Removal)
HKEY_LOCAL_MACHINE\SOFTWARE\KasperskyLab\LicStorage
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography\RNG
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\SystemCertificates\SPC\Certificates
4.Run Kaspersky, choose 30-day trial key and activate.
5.When the 30-day trial key expired, run these steps again.

到期后重复上述步骤即可。