win7自带的虚拟机打不开了怎么办

pei12010342: 我输入$sudo fdisk /dev/sda命令之后按操作来，然后fdisk -l之后，没有出现/dev/sda3而是 /dev/loop0 165M 165M 0 100% /snap/gnome-3-28-1804/110 /dev/loop1 1.1M 1.1M 0 100% /snap/gnome-logs/81 /dev/loop2 4.0M 4.0M 0 100% /snap/gnome-system-monitor/135 /dev/loop3 16M 16M 0 100% /snap/gnome-characters/495 /dev/loop4 48M 48M 0 100% /snap/gtk-common-themes/1440 /dev/loop5 16M 16M 0 100% /snap/gnome-characters/399 /dev/loop6 51M 51M 0 100% /snap/gtk-common-themes/1474 /dev/loop7 58M 58M 0 100% /snap/core18/1705 /dev/loop8 99M 99M 0 100% /snap/core/8935 /dev/loop9 169M 169M 0 100% /snap/gnome-3-28-1804/116 /dev/loop10 96M 96M 0 100% /snap/core/8689 /dev/loop11 4.6M 4.6M 0 100% /snap/gnome-calculator/704 /dev/loop12 4.0M 4.0M 0 100% /snap/gnome-system-monitor/127 /dev/loop13 4.5M 4.5M 0 100% /snap/gnome-calculator/544 /dev/loop14 1.1M 1.1M 0 100% /sna