I. First, create an emergency disk
Remember: Making a non-virus system emergency boot disk is extremely necessary! It's best to also copy an antivirus software and some tools you find useful onto this disk, then enable write protection.
II. Be cautious at the entry point
When we have something good, we all like to share it with friends, but when exchanging floppy disks or CDs, we must use antivirus software like KVW3000 to scan for viruses! Based on experience, it is recommended that you avoid booting the system from a floppy disk before scanning for viruses. Haven't you noticed that over 90% of viruses are boot sector viruses? Also, do not execute unverified compressed files, such as those downloaded from the internet (though in internet cafes, it might be a different consideration ^_^). Moreover, I advise everyone to be cautious with email attachments (even though some appear to be text-based on the surface), even if they are sent by friends, don't easily double-click to run them.