Avg Anti-Spyware 7.5 - Windows No Disk

When I book my computer, i gert a box that say "windows no disk. I uninstalled Anti-Spyware 7.5 and booted my computer up and this doesn't happen. I reinstalled it and put my key in and then reboot my computer and "windows no disk" pops up again. When I try to run Avg Anti-spyware 7.5 windows no disk pops up again, and I have to hit cancel about 25 times. The only way i can close it is by using ctrl+alt+delete.

I do not have anything really installed on the machine just norton antvirus 2007 and thats it.

if anyone know what the problem is and can help me resolve it, I would greatly appreciate it.