McAfee and Start up disk repair?

I installed McAfee Antivirus software about 9 months ago and couldn't stand what it did to my computer.  I want to uninstall it but I don't know where to get an uninstall program for it.  Does anyone have a suggestions?  I have an iMac G-4 PPC with OS 10.4.11
Also, Disk Utilities says my start up disc needs repaired.  Using the original install disc, what are the STEP -BY STEP instructions to repair the start up disc.  I'm not really savvy so start with staritng up from the install disc, please.
Thank you so much for any help you can give.  I need to keep this computer running for at least several more months.

Try this link: https://kc.mcafee.com/corporate/index?page=content&id=KB54975
Many antivirus utilities will make a horrendous mess of your Mac, but McAfee will render it practically useless. You will need to uninstall it using its uninstaller utility, if one is still available for your G4 iMac.
There are many variants of McAfee, so providing step-by-step instructions for you to follow will be nearly impossible without knowing exactly what version of this junk you installed.
You may be better off completely erasing your Mac and starting over.
This may also help: https://kc.mcafee.com/resources/sites/MCAFEE/content/live/PRODUCT_DOCUMENTATION/ 22000/PD22134/en_US/VirusScan%20for%20Mac%208.6.1%20User%20Guide%20Addendum.pdf

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