![]() In the Windows Setup screen, press shift + F10 to access Command Prompt. Enter BIOS and boot from the installation disc. Insert Windows installation CD/DVD into your Dell laptop and restart it. When you have Windows installation CD/DVD, you can format your Dell Alienware laptop hard drive from Command Prompt. Format/reformat Dell Alienware from Command Prompt And you need to reinstall OS for using it again. ![]() However, you should know that reformat the laptop hard drive will erase all data, including operating system. If you are in the situation aforementioned, it’s not a bad choice to reformat your laptop. To restore the performance of it, I plan to reformat the laptop but don’t know how to do it? Thanks for your help!” “My Dell Alienware M11x laptop, with Windows 10 installed, has been running slowly for a long time and now it is even stuck at loading Windows screen.
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