Is it necessary to install the following updates?

[bd74]

KB2492386
KB2506928
KB2533552
All three updates are listed as "important" updates, but none of them is checked off by default.

 

[anukapri]

KB2492386 Compatibility software update that improves the compatibility experience on windows 7
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KB2506928 fixes an issue in which a link in an .html file that you open in Outlook does not work. This issue occurs on a Windows 7-based or Windows Server 2008 R2-based computer that has Internet Explorer 9 installed
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KB2533552 Your computer may freeze or restart to a black screen that has a "0xc0000034" error message after you install Service Pack 1 on Windows 7
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Now install accordingly if u face any of these issues with yout system. Orelse just ignore

 

[Hopalong X]

How they are checked is determined by how you have Win Update set.

If it were on "AUTO" it would just download and install them.

KB2492386- Download details: Update for Windows 7 (KB2492386)
Install this update to resolve a set of known application compatibility issues with Windows.

KB2506928- Download details: Update for Windows 7 (KB2506928)
Install this update to resolve issues in Windows.

KB2533552- An update that prevents a "0xC0000034" error message when you try to install Windows 7 SP1 or Windows Server 2008 R2 SP1 is available

I have them installed but you will have to decide for your system.

Mike