It won't go down, it just goes on to the second page.
With regards to your problem, how come you do not have an operating system disk? It must have come preinstalled. Sometimes an operating system disk is referred to as a System Recovery DVD or something like that.
What make is your computer?
Approximately how old is it?
Where did you buy it from?
I think your problem might be a malfunction in System Restore or a backup program you have installed. Which sorts of backup programs do you have (eg NTI Backup Now 4.7 or whatever)?
Do you have any of these kinds of recovery programs on the PC? If so, what are they?
If not, you could try this. However, this proceedure will disable System Restore and cause you to loose any saved restore points. Please ensure you have tried the above steps as thoroughly as possible before continuing.
- Boot the computer and login as an administrator
- Go to Start and right click on Computer, then click Properties
- On the left of the window that comes up, go to System Protection
- Click Continue when prompted
A dialog box should appear that looks like the one below. You may have more than one drive checked in the list.
- Uncheck the box next to drive C (mine is named VistaOS, yours might be different)
- Follow onscreen instructions, and reboot the computer
- See if it worked. If not, post back here with the results
Hope this helps, but please try all other steps before disabling system restore.