Strange Error! system.nullreferenceexception

[stustarz]

Hello

I am wondering if anyone can shed some light on the following error message:

"An unhandled exception of type 'System.NullReferenceException' occurred in Unknown Module.

Additional information: Object reference not set to an instance of an object."

Now, this happens everytime I try and run any application. I have opened Visual Studio requested to create a new Windows Application - I run the program and this occurs (I haven't even added a control or looked at the code). When i do add a control it still occurs - it happens with everything - i have downloaded sample projects from Microsoft and it happens, I have reinstalled vs.net, .net framework and Windows XP and still no luck - anyone have any ideas?

[Lunatic3]

The thing which is common in every windows application is a reference to :
system
system.windows.forms
system.data
system.xml
system.drawing

these references for a console application are

system
system.data
system.xml

so, try buildin a console application and you may find out where is the reference problem. by the way, are you sure you have no corrupt installation?

[stustarz]

All sorted out now!

After reinstalling visual studio, Microsoft advised me that the uninstall does not remove everything - they told me to delete numerous registry keys, folders e.t.c and start from scratch - it now works! Only took them 3 months to let me know this but there we go. Thanks for your help anyway