The Kaspersky antivirus software provides protection from malware, ransomware, and other online threats. Kaspersky has a unique feature known as System Watcher that aims to detect malicious and ransomware activities completely. The Kaspersky security cloud-free includes all the antivirus protection required to keep your device safe from threats. The error code 1500 mostly occurs when the program installation starts while the Windows Installer (MSI) is already running. As the message pops out on your device, you need to check if there are any ongoing processes on your system and then wait for them to complete or terminate them. Carry out the steps given on this site to solve Kaspersky error 1500.
Now, see if the Kaspersky error 1500 is fixed.