推荐回答（3个）
注销和关机的区别：
1、关闭部分运行程序和关闭所有运行程序的区别
注销：关闭当前用户环境中运行的程序，清空当前用户的缓存和内存，但不关闭所有用户的在运行的程序。
关机：关闭所有在运行中的程序，关闭系统后台服务，并清空内存数据。
2、不断电和断电的区别
注销：注销只是当前登录的用户退出登录，返回到用户选择和输密码界面，不会关闭电脑并断电。
关机：关机会关闭所有程序并且在关闭后，断开电源连接。
3、再次使用电脑不需要重新开机和需要重新开机的区别
注销：由于注销并没有对电脑进行断电，所有再次使用电脑不需要重新开机，直接使用即可。
关机：关机后系统向主板和电源发出特殊信号，让电源切断对所有设备的供电，计算机彻底关闭，下次使用需要重新开机。
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工作中使用电脑，只是暂时离开可以注销电脑不用关机，这样可以使再次使用电脑的时候可以免掉再次开机的麻烦，提高工作的效率。
关机和注销相比，关机是完全断电且关闭操作系统，而注销却不会关闭操作系统。
注销：指向系统发出清除现在登陆的用户的请求，清除后即可使用其他账户来登陆原来的系统，注销不可以替代重新启动，只可以清空当前用户的缓存空间和注册表信息 。注销适用于需要用另个账户来登录电脑的情况，此时不需要重启操作系统。
关机：系统首先会关闭所有运行中的程序。系统后台服务关闭，系统向主板和电源发出特殊信号，让电源切断对所有设备的供电，计算机彻底关闭，下次开机重新开启电脑，操作系统会重新读取系统文件。
注销只是重新登陆一次系统而已。是关闭程序和会话或者将电脑的正常耗电状态转为低耗能状态。如果用多个用户呢，也可以退出这个用户，转入另一个用户。
关机是关闭系统并断电
拓展资料：
什么时候使用注销:
1.你需要用另一个用户身份来登陆你的电脑,这个时候不需要重新启动操作系统,只要注销你现在的用户即可
2.安装了新软件,更改了注册表,需要让注册表生效可以使用注销,因为每个用户登陆的时候系统会自动重新加载注册表
3.启动项改变,需要让他生效可以使用注销重登陆,在登陆的时候系统会自动重新加载启动项目.
4.除此以外的情况,特别是底层驱动更改,你需要重新启动机器,而不是使用注销操作
注销是关闭正在登录的用户,系统并没有关闭,各种硬件的驱动也还在内存里加载着,从内存内清除的只是注册表里user键的东西.注销后,可以以另一个身份登录系统.而不需要重启.
关机是关闭操作系统.
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