Done. A minor hiccup with graphics drivers and Lenovo BIOS update, but so far - so good.

You did the right thing. You have reduced your risk of a more serious problem down the track. Well Done. 

Kookoo: Done. ...

Did you use the Microsoft Media Creation Tool or the Lenovo image creator?

ANglEAUT:

 

Kookoo: Done. ...

 

Did you use the Microsoft Media Creation Tool or the Lenovo image creator?

 

Lenovo USB Recovery. It's been a while since I had any use for large USB sticks, so I ended up popping down to the warehouse get a 32GB one. Then it was mostly smooth sailing.

networkn:

 

The problem you have, is if this crypto miner is there, you don't know what else is there. I'd assume that machine was compromised and I'd install from fresh (Wipe not reinstall OS over the top) ...

 

Emphasis mine, because of Perfectl Malware. Don't focus on the OS, focus on the ideas & concepts of the malware.

Excerpt:
=====

Perfctl further cloaks itself using a host of other tricks. One is that it installs many of its components as rootkits, a special class of malware that hides its presence from the operating system and administrative tools. Other stealth mechanisms include:

• Stopping activities that are easy to detect when a new user logs in
• Using a Unix socket over TOR for external communications
• Deleting its installation binary after execution and running as a background service thereafter
• Manipulating the Linux process pcap_loop through a technique known as hooking to prevent admin tools from recording the malicious traffic
• Suppressing mesg errors to avoid any visible warnings during execution.

...

Besides using the machine resources to mine cryptocurrency, Perfctl also turns the machine into a profit-making proxy that paying customers use to relay their Internet traffic. Aqua Security researchers have also observed the malware serving as a backdoor to install other families of malware.
=====

and much more at the link.