Sometimes you may face a situation when Kaspersky Anti-Virus with the latest antivirus database updates installed fails to detect infected files that are successfully detected by Kaspersky OnLine Scanner
The fact is that Kaspersky OnLine Scanner on www.kaspersky.com uses extended antivirus database, and Kaspersky Anti-Virus installed on your PC uses a standard set. You can also install and use extended antivirus database on your PC.