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 software's anti-virus / firewall - Kaspersky Internet Security. This process occurs only from users who have installed Kaspersky Internet Security 2009 or 2010. The executable is responsible for scanning anti-virus additional 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 PhishingSite.
A precaution redoubtable developed by Kaspersky Lab.