If you are using Win 8 or Win 8.1, you may have an issue launching integrated qTest eXplorer Test Pad on Chrome, particularly Chrome version 35.0.1916.114. Visit site Chrome version to know what Chrome version you are using.
The latest update of Chrome affects its ability to launch applications on some Windows 8 and Windows 8.1 computers, because the protocol handling request is not registering within Chrome. (For the technical verification, you can find the bug report at Chromium Google Code project). This issue will be fixed in Chrome version 35.0.1916.150.
You can either switch to other web browsers to run qTest. If you want to user Chrome, you can manual fix it on Chrome using following instruction