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Severity: High

Workaround to Sudden Loss of Internet Access Problem

Date Published : 8 July 2008

Date Last Revised : 14 July 2008

Overview : Microsoft Update KB951748 is known to cause loss of internet access for ZoneAlarm users on Windows XP/2000. Windows Vista users are not affected.

Impact : Sudden loss of internet access

Platforms Affected : ZoneAlarm Free, ZoneAlarm Pro, ZoneAlarm AntiVirus, ZoneAlarm Anti-Spyware, and ZoneAlarm Security Suite

Recommended Actions -

Download and install the latest versions which solve the loss of internet access problem here (English only):

Once you have installed the new version of your product go to "start > windows update" and re-install the Microsoft patch.

  • ZoneAlarm Internet Security Suite
  • ZoneAlarm Pro
  • ZoneAlarm Antivirus
  • ZoneAlarm Anti-Spyware
  • ZoneAlarm Basic Firewall
  • - or follow the directions below.

    Option 1: Move Internet Zone slider to Medium

    1. Navigate to the "ZoneAlarm Firewall" panel
    2. Click on the "Firewall" tab
    3. Move the "Internet Zone" slider to medium

    Option 2: Uninstall the hotfix

    1. Click the "Start Menu"
    2. Click "Control Panel", or click "Settings" then "Control Panel"
    3. Click on "Add or Remove Programs"
    4. On the top of the add/remove programs dialog box, you should see a checkbox that says "show updates". Select this checkbox
    5. Scroll down until you see "Security update for Windows (KB951748)"
    6. Click "Remove" to uninstall the hotfix


    Contact : Check Point customers who are concerned about information contained in this advisory or have additional technical questions may reach our Technical Support team at: To report security issues with Check Point products contact

    Disclaimer : The information in the advisory is believed to be accurate at the time of publishing based on currently available information. Use of the information constitutes acceptance for use in an AS IS condition. There are no warranties with regard to this information. Neither the author nor the publisher accepts any liability for any direct, indirect, or consequential loss or damage arising from use of, or reliance on, this information. Check Point and Check Point products, are registered trademarks of Check Point Incorporated and/or affiliated companies in the United States and other countries. All other registered and unregistered trademarks represented in this document are the sole property of their respective companies/owners.

    Copyright : Check Point Software Technologies Ltd., is a leader in securing the Internet. The company is a market leader in the worldwide enterprise firewall, personal firewall, data security and VPN markets. Check Point’s PURE focus is on IT security with its extensive portfolio of network security, data security and security management solutions. Through its NGX platform, Check Point delivers a unified security architecture for a broad range of security solutions to protect business communications and resources for corporate networks and applications, remote employees, branch offices and partner extranets. The company also offers market leading data security solutions through the Pointsec product line, protecting and encrypting sensitive corporate information stored on PCs and other mobile computing devices. Check Point's award-winning ZoneAlarm Internet Security Suite and additional consumer security solutions protect millions of consumer PCs from hackers, spyware and data theft. Extending the power of the Check Point solution is its Open Platform for Security (OPSEC), the industry's framework and alliance for integration and interoperability with "best-of-breed" solutions from hundreds of leading companies. Check Point solutions are sold, integrated and serviced by a network of Check Point partners around the world and its customers include 100 percent of Fortune 100 companies and tens of thousands of businesses and organizations of all sizes. ©2003–2007 Check Point Software Technologies Ltd. All rights reserved. Check Point, AlertAdvisor, Application Intelligence, Check Point Express, Check Point Express CI, the Check Point logo, Check Point Pointsec Protector, ClusterXL, Confidence Indexing, ConnectControl, Connectra, Connectra Accelerator Card, Cooperative Enforcement, Cooperative Security Alliance, CoSa, DefenseNet, Dynamic Shielding Architecture, Eventia, Eventia Analyzer, Eventia Reporter, Eventia Suite, FireWall-1, FireWall-1 GX, FireWall-1 SecureServer, FloodGate-1, Hacker ID, Hybrid Detection Engine, IMsecure, INSPECT, INSPECT XL, Integrity, Integrity Clientless Security, Integrity SecureClient, InterSpect, IPS-1, IQ Engine, MailSafe, NG, NGX, Open Security Extension, OPSEC, OSFirewall, Pointsec, Pointsec Mobile, Policy Lifecycle Management, Provider-1, Safe@Home, Safe@Office, SecureClient, SecureClient Mobile, SecureKnowledge, SecurePlatform, SecurePlatform Pro, SecuRemote, SecureServer, SecureUpdate, SecureXL, SecureXL Turbocard, Sentivist, SiteManager-1, SmartCenter, SmartCenter Express, SmartCenter Power, SmartCenter Pro, SmartCenter UTM, SmartConsole, SmartDashboard, SmartDefense, SmartDefense Advisor, Smarter Security, SmartLSM, SmartMap, SmartPortal, SmartUpdate, SmartView, SmartView Monitor, SmartView Reporter, SmartView Status, SmartViewTracker, SofaWare, SSL Network Extender, Stateful Clustering, TrueVector, Turbocard, UAM, UserAuthority, User-to-Address Mapping, UTM-1, VPN-1, VPN-1 Accelerator Card, VPN-1 Edge, VPN-1 Express, VPN-1 Express CI, VPN-1 Power, VPN-1 Power VSX, VPN-1 Pro, VPN-1 SecureClient, VPN-1 SecuRemote, VPN-1 SecureServer, VPN-1 UTM, VPN-1 UTM Edge, VPN-1 VSX, Web Intelligence, ZoneAlarm, ZoneAlarm Anti-Spyware, ZoneAlarm Antivirus, ZoneAlarm Internet Security Suite, ZoneAlarm Pro, ZoneAlarm Secure Wireless Router, Zone Labs, and the Zone Labs logo are trademarks or registered trademarks of Check Point Software Technologies Ltd. or its affiliates. ZoneAlarm is a Check Point Software Technologies, Inc. Company. All other product names mentioned herein are trademarks or registered trademarks of their respective owners. The products described in this document are protected by U.S. Patent No. 5,606,668, 5,835,726, 5,987,611, 6,496,935, 6,873,988, 6,850,943, and 7,165,076 and may be protected by other U.S. Patents, foreign patents, or pending applications. Any reproduction of this alert other than as an unmodified copy of this file requires authorization from Check Point. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Check Point Software Technologies Inc.


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