You should exercise extreme caution: downloading "serial keys" or "cracks" from unofficial websites is a primary way malware, ransomware, and spyware are distributed. Instead, use official methods to download and activate the software. Official Download & Activation
Searching for "srial ksper zip" strongly suggests you are looking for a antivirus, often packaged in a .zip file.
: Visible within your My Kaspersky account dashboard under the active license. Risks of Unofficial ".zip" Downloads
: Download the latest setup files from the Kaspersky website.