How to solve the problem of java security with TopCoder Arena

If you can’t open your TopCoder arena because your security settings have blocked it, you have 2 ways to resolve that problem.

First Method:

1- Go to control panel, and choose Java.

2-Download this file.

3- Open the security tab, and choose Manage Certifications.

4- Choose import, then select the file you have just downloaded(TC.csr), then click open.

5- Click close, then OK.

Second Method:

1- Go to control panel, and choose Java.

2- Open the security tab, and choose Edit Site List.

3- Add these sites:

http://topcoder.com
http://www.topcoder.com
http://arena.topcoder.com
https://topcoder.com
https://www.topcoder.com
https://arena.topcoder.com

4- Click OK.