Windows Defender Offline gives users the option of running Windows Defender from a CD, DVD, or USB stick in case you do not have an viable internet connection. The features and tools included in the online version of Windows Defender are the same as the one in the offline version.
Once Windows Defender Offline is installed in your removable media, it should run the same as if the application was installed in your system. Windows Defender Offline will effectively scan your system and detect and remove malicious applications. However, it is important to keep Windows Defender Offline up-to-date for a successful removal of malicious application. Therefore, you need to run again the Windows Defender Offline installer often and install it again on your removable media.
Windows Defender Offline is a great alternative for many users. It is very convenient and is worth the try.