电脑切换不出来输入法是因为缺少必要的系统文件。
解决方法：
1、下载并安装腾讯电脑管家，在电脑管家的界面处点击左方的“工具箱”，进入工具箱选择工具。
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2、在工具箱界面右方的工具栏列表里选择“电脑诊所”，进入电脑问题的修复工具界面。
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3、在电脑诊所界面点击系统综合栏里的“输入法”。
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4、在进入的输入法问题界面里点击“输入法无法使用”的问题窗口，进入该问题的修复界面。
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5、在进入的输入法问题修复界面里，点击右下方的“立即修复”就可以修复电脑切换不出来输入法的问题了。
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