Yes I have the same problem.  I have just bought an Apple Airport Express and an HP Photosmart printer.  I am trying to get them to run with my Sony Viao VPCEA3C5E.  Both the Apple and the HP installation software will not install as Service Pack 1 for Windows 7 is a prerequite.  I have run the Windows update program and that is telling me that the current version is to up todate  - despite Service Pack 1 not being installed.

I have been to the Windows trouble shooting site http://www.microsoft.com/en-us/download/details.aspx?id=5842

and even when I try to dowload manually that fails. 

I have spoken to the Sony help desk twice.  The first time they have instructed me that it's not a Sony problem, it's a Windows problem.  The Windows site states that as it's a OEM version I should address the problem to Sony http://support.microsoft.com/gp/oemsupport

The second time I called I was told that Sony don't support Service Pack 1. But I could try - but the laptop would become unsuportable by Sony and it would also format my hard disk.

Am I the only Sony customer that uses Apple and HP wireless products ? I find it amazing that Sony aren't instep with the largest manufacturers of PC compatible gear.  When I demanded to speak to a manager I was finally advised that they would be looking in to this ?

Incidently my HP PC works a treat with both wireless product  - do I need to stop buying Sony and start buying HP

Can any one help - I have spent two days on this.