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<h3><a href="/article/e8-bd-89-e8-bc-89-e7-94-a8usb-e9-9a-a8-e8-ba-ab-e7-a2-9f-e7-95-b6-e9-9b-bb-e8-85-a6-e9-8e-96/">[轉載] 用USB隨身碟當電腦鎖</a></h3>
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<span class="date moment">2016-02-18</span>
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<p>原文:<a href="http://www.techsnack.net/lock-your-computer-using-usb-flash-drive/">http://www.techsnack.net/lock-your-computer-using-usb-flash-drive/</a></p>
<p>update:</p>
<p>用簡單的batch應該也可以做到
&gt; @echo off
&gt;
&gt; :1
&gt;
&gt; if exist &ldquo;d:\test.txt&rdquo; (
&gt;
&gt; goto :1
&gt;
&gt; ) else (
&gt;
&gt; echo &ldquo;key file not found&rdquo;
&gt;
&gt; rundll32.exe user32.dll LockWorkStation
&gt;
&gt; goto :1
&gt;
&gt; )
[flipclock ]</p>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p>o you know that we can use our USB flash drive as computer lock? You need a USB flash drive and a freeware called Log Monitor. This article will discuss the steps to configure them.</p>
<p><img src="http://www.techsnack.net/wp-content/uploads/2007/12/log_monitor.jpg" alt="Log Monitor" /></p>
<p>Log Monitor is a freeware that has many usages. I try to go to the author page but i cant understand the language, but i think most probably the author is a Russian. After playing with this application, i found that it can actually lock our computer and prevent others to login. The theory behind this is very simple. It keep monitoring your USB flash drive, once the file being monitored changed, or you remove the USB flash drive, this application will immediately lock your computer. If you remove your USB flash drive and the login to your computer, this application will immediately lock your computer again. Unless you hold the USB flash drive, else you cant access that computer.
<span id="more-274"></span></p>
<h2 id="step-1">Step 1</h2>
<p>You need to create a <strong>.log</strong> file in your USB flash drive. The file name can be anything and you can left your content blank. But, my advise is try to type something and make sure no people can get this file. I had create an example log file and will provide the download address at the end of this article.</p>
<h2 id="step-2">Step 2</h2>
<p>Go to <strong>Monitoring</strong> and choose <strong>Add File</strong>:</p>
<p><img src="http://www.techsnack.net/wp-content/uploads/2007/12/step2_1.jpg" alt="Lock PC Step2_1" /></p>
<p>Now, choose the log file that you created, and change the <strong>Do Actions</strong> option to <strong>If the file has been changed</strong>. Please check the <strong>Perform action if monitored file does not exist</strong> so that this application can lock your computer when you unplug your USB flash drive.</p>
<p><img src="http://www.techsnack.net/wp-content/uploads/2007/12/step2_2.jpg" alt="Lock PC Step2_2" /></p>
<p>After that, switch to <strong>Options tab</strong> and set the <strong>interval</strong> to 1 second. This means Log Monitor will keep pulling each 1 second. If you think that this will affect your computer speed, you can set this value to higher.</p>
<p><img src="http://www.techsnack.net/wp-content/uploads/2007/12/step2_3.jpg" alt="Lock PC Step2_3" /></p>
<h2 id="step-3">Step 3</h2>
<p>Now, go to <strong>Actions tab</strong> and choose <strong>New</strong> -&gt; <strong>Execute Program</strong>. Fill in the parametes below:</p>
<p><strong>Command:</strong> C:\Windows\system32\rundll32.exe
** Parameters:** user32.dll,LockWorkStation
** Start in:** C:\Windows\system32</p>
<p><img src="http://www.techsnack.net/wp-content/uploads/2007/12/step3.jpg" alt="Lock PC Step3" /></p>
<h2 id="step-4">Step 4</h2>
<p>This is the final step. Go back to the main page and choose <strong>Options</strong> -&gt; <strong>Program Options</strong>. At the General tab, check <strong>Minimize on start</strong> if you want Log Monitor minimize to system try when startup. Next, check the <strong>Start on user logon</strong>. Be careful, remember to make 1 copy of your log file if you check this. After you check this option, Log Monitor will automatically launch after you login. If you lost the log file, means you cant control your computer anymore. After everything done, save the settings to your system and try unplug your USB. Your computer will be locked immediately!</p>
<p>You can <a href="http://www.techsnack.net/wp-content/uploads/2007/12/lock.zip" title="Download example and configuration file">download the example of log file and the configuration here</a>. You can also <a href="http://www.freeware-guide.com/download/LOGMON.ZIP" title="Download Log Monitor">download Log Monitor</a> from <a href="http://www.freeware-guide.com" title="Freeware-guide">Freeware-guide</a>.</p>
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