I did a registry clean about a month ago, and since then I get this annoying pop up every time I start my computer. It says the TrayApp disc needs to be inserted. I've searched online and found that it's usually when their is a problem with HP Photosmart software being removed. I checked it and it was stil there, but I went ahead and downloaded a copy, and the service pack. I uninstalled the original software and reinstalled the new copy and service pack, and no dice. It still keeps popping up. I looked up simply TrayApp and there was a program that said it was the TrayApp installer. I loaded it, but it hasn't helped either. it's not a HUGE concern, you just have to drag and drop the box out of the browser window, but I'd really love to have it simply fixed.
I ran into this issue about a month ago with a user when installing a new HP all in one. TrayApp was the first application that tried to install itself on boot followed by WinScan and then PhotoGallery. I used the Windows Installer fix below to solve the issue.
I chose to let me manually fix the problem and that I was having trouble uninstalling a program. It brought up a list of applications and I was able to pick the ones that were trying to install a boot up.
This was on a Windows XP machine. I just tried to run the fix on my Windows 7 machine to verify the steps involved and I received an error so I am not sure if it will work on a Win7 machine.