Microsoft later added that certain nVidia drivers were also affected.
The problems included blocked access to special folders like My Documents and My Pictures, and Office applications that stopped responding when users tried to save files in My Documents. In some cases Internet Explorer became unresponsive.
Microsoft has published instructions on how to fix the issues. But users unable to make the adjustments will be able to access the updated patch on 25 April. The update is only required for users who have experienced problems.
The patch will be automatically distributed through Windows Update, Microsoft Update and Automatic Update services.
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