klwtblfs.exe is an executable that many users look weird when you see the Task Manager -> Processes. Klwtblfs.exe process is not dangerous at all. Yes, even you should calm presence.
klwtblfs.exe belongs softwareacquis anti-virus / firewall – Kaspersky Internet Security. This process appears only to users who have installed Kaspersky Internet Security 2009 or 2010. Executable responsible for additional anti-virus scanning in Internet browser (Outcome acts as a Plugin / add-on IE or Firefox), the web pages opened by the user. URLs are checked considered suspect (Kaspersky URL Advisor), And those who practice PhishingCPC.
A precaution redoubtable developed by Kaspersky Lab.