Perform the operating system upgrade.

执行操作系统升级。

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In some cases, an operating system upgrade may also be necessary prior to migrating.

在某些情况下，可能还必须在迁移前升级操作系统。

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Signal system upgrade mine hoist control system is an important component performance of the system.

提升信号系统的改造是煤炭企业技术改造的一个重要组成部分。

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They had lost access to the service's interactive panoramic photos in a recent system upgrade.

BBC: Google adds Street View to its maps mobile web app

When it is the "cornerstone" of an operating system upgrade, according to Microsoft.

CNN: FROM THE WEB

Can you imagine going through an operating system upgrade every year or two for all the devices in your home?

CNN: Home, sweet networked home