If you are using Kaspersky antivirus for the device protection then, you must have a question against the Kaspersky database corrupted. This error will get you stuck and Kaspersky also stops protecting your device. To resolve this error, you will need to update the database. Try to update antivirus databases of Kaspersky Internet Security and for that, in the main Window, click on Update and then, Run Update. Restart the application and if the update gets failed with the same error then, try to reboot the application. Call on Kaspersky Helpline UK if you are facing any issue while updating the database.