MamaWolf
First off, thank you for the prompt and detailed information. 🙂 This will help us troubleshoot a little better.
Now for your first question about "where is the home folder?":
Double-click your hard drive icon and open it. On the left hand side, there should be a column of icons, one of which should look like a house and have your user name under it. This is your home folder, and is the default folder for a lot of things. Right-click on the house (or control-click, if you only have a one-button mouse) and then select "get info". A window should pop up with a bunch of details about the home folder, and the second line you see should be "Size". Please let us know what that number is.
And as for using 10.4.11 - please don't apologize. 🙂 While it's not the "latest and greatest" it is still a viable and flexible operating system. I still have a 10.4.11 drive for my G5 Powermac - I occasionally use "Classic" (and 10.4.11 is the LAST operating system to use Classic), and I think it runs a little bit faster than 10.5 Leopard.
OK, Good that you automatically run Software Update.
However, I notice that you only have 1GB of RAM. I think the single most important thing that you could do for your system slowdowns is to ad more RAM. I *believe* that you are running a QuickSilver 2002 G4 (I'm not an expert on the PowerMac G4), and the maximum RAM it can take is 1.5GB, which means that you *should* be able to add one more 512MB RAM module to the computer. It will make a difference in speed.
To repair permissions on your hard drive: Open up the Applications folder. In the Applications folder, there is a folder called "Utilities" - open this. Then find the program called "Disk Utility". Run this. When Disk Utility pops up, there will be a list of all of your drives (hard drives, and any mounted CDs or DVDs) on the left hand side. Select your hard drive then go to the lower center of the window and click "repair disk permissions". Let it run - this may take a while. You may want to run "repair disk permissions" twice just to make sure.
Activity monitor will tell you what is running on your computer - you say that you are only running only one program at a time, but if that program is Safari (or another web browser) you will start to notice slowdowns if you have several tabs open at once (especially only with 1GB of RAM). Go back to the same Utilities folder (inside of the Applications folder) that you opened for Disk Utility. (It's the same folder that Disk Utility is in.) Find the Activity Monitor program in this folder, and run it. At the center top of the program window, there should be a drop-down menu - click it and select "all processes". Look at the listing below - there are all of the programs and processes that are running on your Mac right now. As you go across the top row, you will see "Process Name", "User", "CPU" and more stuff. Click the little box that says "CPU" until you get a down arrow (or downward pointing triangle). This will order the list of programs in descending order, starting with whatever is using most of your CPU...the numbers in this column are the percentage of your CPU that the programs are taking. If you have one program that is taking, say 80% or more, then this will also slow your computer down as it devotes is resorces to that one program at the expense of other things.
Also, at the bottom of the Activity Monitor window, there should be several choices including "CPU", "System Memory", "Disk Activity" and so on. Click on "System Memory". This will tell you how much of your RAM is being used at the moment (if there is a pie chart, the more green the better!). It will also tell you "VM size" and "Page ins" and "Page outs". VM is "virtual memory" - when your computer runs out of real RAM, it starts storing things on the hard drive - pretending the hard drive is "real RAM". However, the hard drive is many, many times slower than ream RAM, so this will slow your machine down. The "Page ins" and "Page outs" will tell you how much this Virtual Memory is being used. The only cure for this is to add more real RAM to your computer.
Whew. My fingers are tired. LOL 🙂 🙂 I hope this wasn't to eye-straining to read! Just respond back with any more questions...we're here to help!
Richard