Remember the HiRen's boot CD?

This was a self booting Windows OS project that booted the OS directly from CD and contained a lot of utilities, tools and hardware drivers. It was very useful for testing, diagnosing and repairing a PC. Fixing HD issues, removing malware and viruses and running benchmarks.

There haven't been any official HiRen's releases since 2012, but I just discovered the community decided to resurrect the project recently. It now runs a self booting Windows 10 64bit PE (preinstallation environment).

They seem to be keeping it fairly up to date which is useful for virus and malware removal.

https://www.hirensbootcd.org/