I've started to see the following exception anytime I try to create an instance of xamPivotGrid :

"Initialization of 'Infragistics.Controls.Grids.XamPivotGrid' threw an exception.' Line number '134' and line position '23'.
{"Could not load file or assembly 'InfragisticsWPF4.DragDrop.v11.1, PublicKeyToken=7dd5c3163f2cd0cb' or one of its dependencies. The system cannot find the file specified.":"InfragisticsWPF4.DragDrop.v11.1, PublicKeyToken=7dd5c3163f2cd0cb"}"

'InfragisticsWPF4.DragDrop is present, but Dependency walker for this file  shows that 2 dlls are not found in the system :

wer.dll and IESHIMS.dll.  On stackoverflow I've found a reference to same problem - http://stackoverflow.com/questions/2465111/dependency-walker-reports-ieshims-dll-and-wer-dll-missing

Apparently IE7 requires those (and other ) dlls that are referenced by 'InfragisticsWPF4.DragDrop

On my system with automatic updates I have IE8. I do not know if it was recently insalled as part of automated update process. According to the article on Stackoverflow IE8 (designed for Windows 7) does not require those dlls and gets rid of them during installation process. I have uninstalled IE8 and intalled IE7 but same exception appeared for same 'InfragisticsWPF4.DragDrop . Dependensy walker showed diff. missing dlls

I have also tried manually download and put in System32 those dlls . Did not work. Same exception and DependencyWalker reports "

Warning: At least one module has an unresolved import due to a missing export function in a delay-load dependent module.

I wonder if anybody else came across this issue ?

Thanks.