Tag Archives: blocked

Application blocked by Java Security

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After countless security issues, Oracle has decided that only applets that can present a valid certification can run. And there is no “opt out”. Well, I guess they just got fed up with being blamed of all sins in the world and made their security ridiculously strong. As such, many applets, especially those on small devices like cameras, switches, etc, won’t run at all.


Application Blocked; Click for details. Your security settings have blocked an application signed with an expired or not-yet-valid certificate from running.

Until version 8, the solution was to put Java in “medium security” mode. But the slider is gone now and the only options are High and Very high.

Anyway. To make those applications run again you’ll need to add the URL of the application in the Exception Site List in the Java Control Panel. Here is how that works.

( 1 )First you need to know URL where the application runs. If you know it already, skip to section 2.

Open the page with the blocked application.


Right click the application and choose “inspect element”. That will bring up the source code of the application.


Look for codebase= and copy down that URL ( in this case ). This is the URL we will use to put in the exception list.

( 2 ) Configure Java

Go to control panel and search for the Java configuration.


Double click to open the Java Control Panel.


Go to the tab Security and click the Edit Site List button.


In the Exception Site List window click the Add button. There you can enter the URL of the application as you found it in section 1. Note that you need to add a slash to the end ( / ). The slash will tell java to allow execution of applications that run from there and all sub-directories.

Click ok.

Dismiss the security babbling by clicking Continue.

Click ok again to close the Java Control Panel.

Now KILL Chrome (or firefox or internet explorer), because the changed settings will only work if the browser is restarted.


Note that just closing Chrome will not end the browser. It will still be running. Kill it in the task manager.

If you don’t want to kill them one by one, you can use following command from the DOS prompt.
taskkill /F /IM chrome.exe

Restart the browser and try again. It should work now.

Move file in use , who is blocking it or using it , force move delete

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We’ve all experienced it sometime: A file or folder is in use, and windows refuses to move or delete it. Even though it should, Windows rarely shows us what or who is blocking the file. Left in the dark, you’ll end up closing all sorts of apps, killing explorer, and what not. Then there are those cheesy apps, like “who’s blocking”, that do all but free the file. So.. there we are.

A few days ago, I stumbled upon a small command line app from Mark Russinovich. Now, that sounds like a guy who knows how to kill a blocking app. 😉 (just kiddin’). In fact, his app called “handle” is featured at Windows Sysinternals. Here is what it did for me.

I had this demo of Mixmeister and I wanted to “move” the downloaded install-file-folder to my backup drive. But somehow it was blocked. Windows, endlessly informative, told me nothing that I could use:


So I fired up HANDLE. I asked it to tell me who’s blocking Mixmeister.

Handle mixmeister

I then got a list of “handles”, two of them were explorer and one of them was my browser chrome. To chase these apps away from my folder (file), I needed the PID of the app and the handle on the file. Handle provides both. In my case, explorer had pid 3796 and the handle on my folder had 1978. I could now get it off by entering:

Handle -c 1978 -p 3796


I did the same for the other two handles, and see there: The folder was free and I could move it quite happily.

Just remember: Killing handles “can” crash your machine. When attempting this, always make sure any unsaved data is saved!

You can download HANDLE from here.

Bad Behavior has blocked 1055 access attempts in the last 7 days.