Yeah, it's a folder that's created off the root, wutemp, or something like that. Problem is, once they're done installing, they're deleted. What I've done in the past, is as soon as it's finished downloading, before it starts installing anything, I copy and paste them to another folder.
Not anymore though. If you're on broadband, it doesn't make sense to do this, because it takes just as long, if not longer, to install them from what's been downloaded, as it does to actually download them and install them all again. This last time I reinstalled, I had a bunch of updates that were burned to CD, including service pack one. But I just did the standard windows update, and it took everything, including sp1, about 3 hours. The last time I reinstalled about 8 months to a year ago, I did the updates I'd downloaded up to that point, including sp1 (when it first came out), and it took over 3 hours to do that (sp1 was an hour and a half by itself). And obviously there were a considerable amount more after 8 months to a year, to download/install.
If you're on dialup though, then definitely, there's a good reason to back up the installation files.
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