Hi, there is a 'Hotfix' for this type of situation. You can download it here:
Download details: Update for Windows Vista (KB941090)

If this fails I'm sure there's a couple more 'Hotfix's of a similar nature, the only thing is that you'll have to look through the update section to find them. You can find the Vista updates here:
Microsoft Download Center Search Results
Luckily enough the list isn't that massive... Also with the advent of the latest SP1 for Vista you'll be getting these updates anyway so if you want to wait it's up to you.

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