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Step-by-step: Running the virtual laboratories

Overview of the procedure

  • Install Java for your browser - download from www.java.com
  • Add our certificate among the trusted ones (see below) - all the virtual laboratories are signed by this certificate
  • (For Google Chrome browser) Enable NPAPI
  • Restart your browser
  • Run the virtual laboratory of your choice

(For Google Chrome browser) Enable NPAPI

Recent changes in Google Chrome browser disable the NPAPI from default. If you want to run the Java applets in the browser you have to reenable the API.

  1. 1. In your URL bar, enter: chrome://flags/#enable-npapi 
  2. 2. Click the Enable link for the Enable NPAPI configuration option.
  3. 3. Click the Relaunch button that now appears at the bottom of the configuration page.


Verify Java installation in your browser

Visit the Java verification page and run the testing Java applet. 

Adding the certificate in Windows

a) Open Control Panel in Windows, select Programs and open the Java Control Panel

b) Select the Security tab and click the "Manage Certificates..." button

c) Select the "Signer CA" certificate type and click the "Import" button

d) Browse for the certificate in your computer and confirm the import. The certificate will appear in the list.

e) If you already used our virtual laboratories, you need to delete the temporary files of Java stored in your computer. Switch to the General tab and click the "Settings..." button.

f) Click the "Delete files..." button

g) Tick all three items and confirm deleting the files.

h) Close all control panels.

i) Restart your browser and you will be able to launch any of our virtual laboratories.


Still not running?

In the case you have troubles with running any of our virtual laboratories, please contact us.