Do you have "Walshed" your Windows Phone 7 device aka have you updated it with ChevronWP7.Updater because you couldn't await the official Windows Phone 7 NoDo roll-out by your carrier or manufacturer? Well, as it turned out later, the ChevronWP7.Updater way wasn't as riskless as initially expected (see Update 4 here). After Microsoft rolled-out the NoDo update, it sent out another update to fix a security issue with certificates and ChevronWP7.Updater updated phones were throwing a rather specific error code "80180048" when trying to update. That's exactly what Microsoft warned about that backdoor updated phones might be unable to get future Windows Phone 7 updates.
However, Chris Walsh has now developed a tool to bring back "Walshed" phones to the regular update path. This tool has been even tested by Microsoft's Brandon Watson and his team and received the approval to release it to users for use.
As the screenshot shows, users just need to carefully select the right languages installed on the phone. Executing the "Walshed Phone Support Tool" will repair "Walshed" phones and put them back on the official update path.
The Walshed Phone Support Tool is available for 32 Bit and 64 Bit Windows versions and requires the installation of Microsoft's "Windows Phone Support Tools" too. Once completed, users can try and update their Windows Phone 7 via Zune. If it prompts that an update to 7392 is available, great, if it doesn't, it most likely means that update is yet not available as the carrier might hasn't approved it.
Cheers ~ Arne