Silverlight 4.1.10111 security update broke my computer

Question

Just seeing if anyone knows anything about this. I installed the 4.1.10111 SL security update today, and then went to run one of my SL 4 projects, and I get a failed to load pre-requites error message every time I debug (the error gets thrown by JavaScript in the host html page).

This is the MS KB: http://support.microsoft.com/kb/2668562

I've tried un-installing the update, un-installing SL, and restoring from restore point before the update... VS still fails with the above stated error message, and I when I navigate to a SL site, I get a blank white page, or plug failure message.

Does anyone know a fix for this? *smacks head for trusting Microsoft's updates

Answer 1

You need to install the Silverlight_Developer.exe runtime that matches the version of Silverlight Runtime that you have installed. Since you received the patch to 4.1.10111 of Silverlight Runtime, you must download that same version of the developer runtime and install it.

You can download the 4.1.10111 of the developer runtime here: http://www.microsoft.com/download/en/details.aspx?id=28813

Also, someone nicely set up a site to identify what version of Silverlight Runtime you have at silverlightruntime.com. I have found this to be very useful.

EDIT: I did just have to uninstall Silverlight 4.0 completely on my machine. I was able to install JUST the developer version and it seems to be working well, unlike my experience with previous builds where I had to install one and then the other.