The computer must be restarted before updating dating a fat guy

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Windows Update (or WU, as we like to say within the team) currently updates over 350 million PCs running Windows 7 and over 800 million PCs across all the supported Windows platforms.

There are actually many more PCs updated by WU indirectly if you account for our Windows Software Update Server, and for those machines (or customers) that do all updates manually for any number of reasons.

The speed of each download is primarily determined by the internet connectivity of the PC, something that WU has no control over, so it is interesting to see below that the majority of update activity occurs in the first three days after release.

This three-day number is a key one that I will come back to when we talk about improvements in Windows 8.

In one week, 90% of users worldwide who need the update have successfully completed installation, including the restart, with the number of installations pretty much flattening out after that.

Figure 1 – Completed download and installation of updates from time of release of update The balance of how broadly and how quickly we can update has proven beneficial to our users to the point where updating is mainly viewed as a background maintenance task (and justly so!

The problem is not subtle if encountered, the update halts and then displays a “Connect to i Tunes” screen similar to recovery mode, preventing the update from going further.

Essentially this means the i Phone or i Pad will be bricked and unusable until it can be restored or successfully updated with i Tunes and a computer.

The chart below (figure 1) shows us how fast downloads and installations occur on Windows 7, from the time of release of an update.It is important to understand that for many updates, even if you could continue running the existing code that is already in memory, it is that very code that is a security vulnerability (for example), so the risk to the security (or reliability) of the machine would remain until you restart your machine. In the meantime, applications that support the Windows Restart Manager (introduced in Windows Vista) can return you to precisely where you left off after a restart.In this blog, I want to talk about some of the improvements we are making to the automatic updating experience in Windows 8, which will make restarts a little less annoying.Today Windows Update is one of the largest services on the Internet by several measures, and of course we're using Windows 8 development as a chance to improve the experience of product updates too.This post was authored by Farzana Rahman, the group program manager of our Windows Update group.

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