No viruses for OS X. Make sure you have enough available space on your startup disk. 2GB or more should do it. I ran out of space once and experienced similar symptoms as you are.
Joshua.
TheMud wrote:
Is there a good virus "killer" searcher for the mac. ?
The mac that is a little slow at the moment is a iMac G4 1GhZ .. OS 10.4.10
It runs strangly at the moment. For example this text was quite slow to write :-(