Macintosh boot-up

I am having trouble starting my computer,   The hard drive is not recognized as a startup disk,  ( I think the directory is dammaged),    However, I do not have a copy of the Disk tools  any longer.  What can I do to solve this problem??
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1)Go to control panel and open startup disk. Highlight the drive you want and close.
2) Your system CD has disk tools in it.  Put CD in drive, restart holding the C key down and run disk tools from there.
3) No CD. Go to and download what you need.
4) Rebuild your desktop. Hold down the command/apple key and the option key at the same time and restart your computer. Hold them down until started and asked if you want to rebuild it.
Click yes.
This should do it for you. Anymore than that and you might have bigger problems. More info on your system if you're looking for more help.

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A copy of Norton Utilities couldnt hurt either.
Glad it worked for you.
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