I have previously used widi with my Samsung Series 9 laptop (Windows 7) and Netgear TF 2000 adapter - no issues
After not using the laptop for a week or so, now I cannot even start the Widi tool - it crashes with "unable to start intel widi technology" message.
All Widi tools/drivers came pre-intsalled with the laptop and were working just fine up until now. No changes to laptop config other than Windows updates
Thank you for your post.
From your description it appears that a feature got corrupted, this may happen if unsafe shutdowns occurred while it was running, and in some cases also after some updates it could corrupt a registry entry.
There are two things that you can do; you can do a system restore to a date when this still worked: http://windows.microsoft.com/en-US/windows7/products/features/system-restore. You may also just reset one of the components, the Intel® My WiFi Technology:
I hope this helps