You have to use Internet Explorer and allow the scan--firewall or security software might block it. Or just use the same diagnostics already on your hard drive in the boot menu. Post your model computer for directions or just look it up in your online manual. Newer models use F12 as soon as you reboot to get to the boot menu.
I tried many times to install and use the complete system diagnostics on the support home page. Even the quick test does not work at all. It installs the Dell System Detect software. After that point it moves on to the Support Assist Client installation tab and remains stuck there forever. I tried many times. Installing uninstalling and every possible way to solve this but have no success. I need help if some one can solve it for me. The system auto detects my service tagg but that is all it does so far with me.
I can not install/use the online diagnostics tool of Dell.