I've been using my old iBook (G3 600MHz, 384 MB RAM) for the last few months since I had to leave my iMac home. Yesterday, the cursor started to lag every now and then, and then completely froze. The rest of the computer seemed to work normally. I could use expose through the function keys, or use various keyboard shortcuts to do things, but the cursor was frozen. Clicking on the trackpad's button did not produce any result and the trackpad itself did not move the cursor. I rebooted and had the same problem shortly after. I had to reboot many times yesterday and today because of this particular problem. I'm not entirely sure of what's causing it, but I suspect Firefox - or some Firefox extension - might be the problem. I used to use Safari, but decided to try Firefox since Safari doesn't allow me to format the text of my blog online. I liked it and installed a few extensions. A weather forecast extension made my computer crawl to painfully slow speeds, so I uninstalled that one and everything went beack to normal - until the trackpad problem. Another possible culprit would be Skype. I started letting it run 24/7 a few days ago since I got a Skype In number, but the problem seems to happen even with Skype off, so I sort of discarded that possibility. Does anyone have tips as to how I can figure out where the problem is and what I need to do to fix it? It might be a hardware problem, but I doubt it since a reboot seems to solve the problem for a while. As I type these lines in Safari, my trackpad is working fine. I have not opened Skype or Firefox since my last reboot. One more question: Is there any way to adjust the size of the virtual memory? Activity monitor shows that mine is about 2,17 GB at the moment. However, I only have about 1.46 GB left on my hard drive. Can that be the cause of my problem?!? It's an old machine, I know, but I'd still be useful to me if I could get it to work properly. Thanks for any tip or idea you can give me. P.S. I know it's a long rant, but I wanted to give as much information as possible so I would get focused advice.