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Do you have any other firewall on, like the Windows Firewall? That will create conflicts and possibly cause the LAN to drop.<br />
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Also, have you tried checking for an unrelated intermittent network problem. Try a network analizer or even just continuous pinging to check.
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Do you have any other firewall on, like the Windows Firewall? That will create conflicts and possibly cause the LAN to drop.

Also, have you tried checking for an unrelated intermittent network problem. Try a network analizer or even just continuous pinging to check.

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LAN networking working fine. Only internet is getting disconnected. No firewall is enabled. 
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LAN networking working fine. Only internet is getting disconnected. No firewall is enabled.

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Trend micro Worry-Free Business Security Standard - 6.0 cutting the internet connection time to time in the PC and block useers can not send &nbsp;email out side using outlook. The icon in the status bar turn red for the trend micro. After I uninsatll the rend micro everything work fine. Any solution from trend micro.
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Trend micro Worry-Free Business Security Standard - 6.0 cutting the internet connection time to time in the PC and block useers can not send  email out side using outlook. The icon in the status bar turn red for the trend micro. After I uninsatll the rend micro everything work fine. Any solution from trend micro.

Trend micro Worry-Free Business Security Standard - 6.0 cutting the internet

Anti-virus software was originally developed to detect and remove computer viruses. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In particular, modern antivirus software can protect from malicious browser helper objects (BHOs), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious layered service providers (LSPs), dialers, fraud tools, adware and spyware. Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity theft (privacy), online banking attacks, social engineering techniques, Advanced Persistent Threat (APT), botnets and DDoS attacks.

Anti-Virus Apps

Various techniques are used to prevent email spam (unsolicited bulk email). No technique is a complete solution to the spam problem, and each has trade-offs between incorrectly rejecting legitimate email (false positives) vs. not rejecting all spam (false negatives) - and the associated costs in time and effort. Anti-spam techniques can be broken into four broad categories: those that require actions by individuals, those that can be automated by email administrators, those that can be automated by email senders and those employed by researchers and law enforcement officials.

AntiSpam

Operating system security (OS security) is the process of ensuring OS integrity, confidentiality and availability. OS security refers to specified steps or measures used to protect the OS from threats, viruses, worms, malware or remote hacker intrusions. OS security encompasses all preventive-control techniques, which safeguard any computer assets capable of being stolen, edited or deleted if OS security is compromised, including authentication, passwords and threats to systems and programs.