Slow boot up and computer freezes...???

hey all. This problem just started this week. I think it might be due to the 10.4.10 update. anyway, i noticed that the boot up time is considerably slow now. during startup w/ the gray screen and the apple logo in darker gray, that little clock face with it blinking clockwise shows up below the apple logo. this normally happens when i upgrade the software... but its happening everytime i boot up the computer.
also, the computer freezes up... once when i was watching a movie on quicktime and i moved the mouse to see how much time left in the movie. the other time, when i was listening to music andi moved the mouse. the screen gets darker, but not totally black, like the computer is saving power and a message saying that i have to hold the power button down for at least 5 seconds to turn off the computer. the message is in two other languages. this happened in a period of two days....
any idea on what could be the problem and how i go about solving it??
thanks!

Hello,
First thing that comes to mind is... how much free hard drive space do you have? To view this information, open a Finder window. The information is the bottom of the window. Never allow the drive to have less than 15% free hard drive space because that will slow down your Mac faster then anything else.
Ok... it's freezing up on you. Grab your system restore disk(s). Make sure your Mac is turned off. Now, press the power button, hold down the C key and insert the restore disk all at the same time. Let go off the C key when you see the Apple logo on your screen. Now, by default the Installer window will open. Quit the Installer from the Menu and instead click Utilities/Disk Utility. When DU opens, select MacintoshHD in the panel on the left. Then click Verify. If DU reports errors on the drive, click Repair. Now, while you have DU open, also, Repair Disk Permissions.
Get Onyx. It's a great disk FREE utility and can fix a myriad of problems. You can download it right from the Apple site here:
http://www.apple.com/downloads/macosx/systemdiskutilities/onyx.html
The message you are seeing is called a "kernel panic" and you can find information for that here: http://docs.info.apple.com/article.html?artnum=25392
Hopefully something has helped!
Carolyn Happy 4th! Fireworks are going off here all across the bay as I type

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