Help! How to check for virus on IBook G4

Okay, I have been getting the multicolored swirly ciricle thing when I try to do anything online or though word on my Mac, it is significantly slower and has done this before. The tech support guy showed me how to scan for viruses and restore it after they were found. Can anyone help? Thanks.

Welcome to the iBook Discussions!
Since there have not been any viruses released in the wild that will infect a computer running Mac OS X, it's not a virus that is causing the trouble. If all you want to do is search for a virus, you can use ClamXav. But, we can be fairly certain this won't really clear-up your trouble. Is there any other troubleshooting you've tried? Have you used the Disk Utility (in your /Applications/Utilities/ folder) to "repair disk permissions"? Have you started up from your Mac OS X install disk and used the Disk Utility there to "repair disk"?
-Doug

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