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Windows 7 SP1 has arrived on Windows Update, and after installing it, you may be tempted to claim back some of your hard drive space — and many tech sites advise you on how to do so. The How-To Geek suggests waiting a while on that (http://www.windows7newsinfo.com/smf/index.php/topic,15368.0.html), mostly because you won’t know right away if any bugs or crashes may crop up that could warrant a roll-back.