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Why do Dot Net framework updates take so long to install?

Posted on 2015-02-17
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It seems to me that, relative to their size, Dot Net updates take much, MUCH longer to install than other Microsoft updates. My computer is currently installing a security update for Microsoft Dot Net 4, and I could have installed Microsoft Office Professional Plus twice by now.
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Question by:R. Toby Richards
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awawada earned 500 total points
ID: 40615349
Why do Dot Net framework updates take so long to install?

Updates to the .NET Framework 4 require a complete regeneration of the Native Image Cache, a very time-consuming operation.

Source:
http://support.microsoft.com/kb/2570538/
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