HTC Sync fails to start when phone connected "updating htc library"
Your problem is due to errors related to HTC Sync, Windows 7 and Adobe AIR. There is a bug opened on Adobe site: https://bugbase.adobe.com/index.cfm?event=bug&amp;id=2966976
The workaround should be to downgrade Adobe AIR to 2.6.xxx version. You can download it here. Upgrading to Adobe AIR 3.0.0.3880 RC1 didn't worked for me.