Keep them disconnected from the main system, when not being made, (off site is better is practical)
Keep you system fully patched WanaCry uses quite old vulnerabilities.
Run a reliable anti-Malware, preferably one with specific Ransomware protection
This combination should stop WanaCry and it's variations, The backups mean that even if you get hit by some new Zero Day exploit you can recover
There is also the technique for WanaCry of disabling the SMB1 Service which is used to propagate the code locally, but you must first check that none of you other devices rely on this for communication, (My TV's do)
Windows 11 Pro x64 [Latest Release and Release Preview]
CPU
Ryzen 9 5950X, 3.8 - 5.2 MHz
Motherboard
Asus Prime X570-Pro
Memory
64GB [2 x 32GB] DDR4 3200MHz
Graphics Card(s)
4GB NVIDIA GEFORCE GTX 1650 Ti
Sound Card
On-board SPDIF to 5.1 System + HDMI [5.1 system]
Monitor(s) Displays
32" UHD 32 Bit HDR Monitor + 43" UHD 4K 32Bit HDR TV
Screen Resolution
2 x 3840 x 2160 @60Hz
Hard Drives
1TB M2 SSD OS, 500GB Fast Access SSD, 2 x 8TB Data + Various Externals from 1TB to 4TB, 10TB NAS
PSU
NZXT C750 80 PLUS Gold 750W Modular PSU
Case
Workstation Case [Matt Black]
Cooling
NZXT Kraken X63 280mm CPU Cooler +2x Quiet Case fans
Keyboard
Logitech Wireless MX Keys & K400 + others
Mouse
Logitech Wireless MX Master 3S
Internet Speed
920 MB Down 50 MB Up
Antivirus
BitDefender Total Security Pro
Browser
Chrome (always run latest Non-Beta)
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
Samsung 10.2" tablet
Blackview TAB 8 4G Android Tablet c/w Keyboard
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control
Computer type
Laptop
System Manufacturer/Model Number
Dell XPS 17 10750H
OS
Windows 11 Pro x64 Latest RP
CPU
Intel I7 10750H 5.0GHz
Motherboard
Dell XPS
Memory
32GB [2x16GB] DDR4 2933 MHz
Graphics Card(s)
nVidia GTX1650Ti 4 GB GDDR6
Sound Card
Stock [Realtek] 4 Speaker
Monitor(s) Displays
17" IPS UHD+ Infinity Edge Touchscreen
Screen Resolution
3840 x 2400
Hard Drives
2TB M2 NVMe, 4TB External + various 500GB & 1TB External NVMe (also have access to spinner HDD from
PSU
Stock
Case
Stock XPS Aluminium & Carbon Fibre
Cooling
Stock - Active Fan Control
Keyboard
Backlit + Various Logitech
Mouse
Stock Track Pad + Logitech MX Trackball
Internet Speed
72 MB Down 18MB Up
Browser
Chrome
Other Info
Also run ...
Laptop - Quad 8GB - Windows 10 Pro x64
Nexus 7 Android tablet x2
10.2" tablet
Sony Z3 Android Smartphone
Wacom Intuos Pro Medium Pen Pad
Wacom Intuos Pro Small Pen Pad
Wacom Expresskeys Remote
Loopdeck+ Graphics Controller
Shuttle Pro v2 Control Pad
10TB NAS
what is it?
how it works?
how does it get on user computer?
what can you do while wannacry is spreading out?
how to prevent ransomware attacks?
what't the ransomware incident response plan?
how to do ransomware doc file recovery after infection?
...