XSLT Problem with Windows KB2844286

If you have any clients on the Automatic Tuesday Windows Update cycle, and they are running SharePoint on premise, please be aware of a critical issue that occurred at one of our clients as a result of the June 11^th Updates that were installed last night.

It will be very obvious, the WebPart Header will display OK, but all contents in the webpart disappear and will instead show an error


Error while executing web part: System.NullReferenceException: Object reference not set to an instance of an object. at System.Xml.Xsl.XslCompiledTransform.Load(MethodInfo executeMethod, Byte[] queryData, Type[] earlyBoundTypes) at Microsoft.Xslt.STransform.GetCompiledTransform() at Microsoft.SharePoint.WebPartPages.BaseXsltListWebPart.LoadXslCompiledTransform(WSSXmlUrlResolver someXmlResolver) at Microsoft.SharePoint.WebPartPages.DataFormWebPart.GetXslCompiledTransform() at Microsoft.SharePoint.WebPartPages.DataFormWebPart.PrepareAndPerformTransform(Boolean bDeferExecuteTransform) 5962a0e6-2114-4dad-9682-5b327c6e47e1





The Solution
Go To Control Panel, Programs> Programs and Features > View installed Updates
In the Windows section, find Windows KB2844286
Uninstall it. (And you may want to disable Automatic Updates)


open elevated Command Prompt and run IISRESET