My Macbook freezes after using it for awhile

Question

I startup my MacBook (aluminum 2008 verions) running lion 10.7.1 and after about 5 minutes of using it, my computer displays the rainbow cursor and freezes. I am unable to click on anything or force quit.
My processor is 2.4 Ghz and has 2Gb ram.
It would be great if someone could give me any thoughts ASAP as I have an assignment due next week and need my computer.
Thanks in advance

Answer 1

Your problem is caused by third-party software that you installed. I'd need more information to be more specific.
Reboot as usual (not in safe mode) if you haven't already done so. Launch the Terminal application, copy or drag -- do not type -- the line of text below into the window, and press return:
kextstat -kl | awk ' !/apple/ { print $6 $7 } '
Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.)
Next, do the same thing with this line:
sudo launchctl list | sed 1d | awk ' !/0x|apple|com\.vix|edu\.|org\./ { print $3 } '
That's one line, not two. You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.
Next, this command:
launchctl list | sed 1d | awk ' !/0x|apple|edu\.|org\./ { print $3 } '
Again, one line. Finally, one more:
ls -1 /Library/{InputManagers,StartupItems}
Remember, this is all drag-and-drop or copy-and-paste, whichever you prefer -- no typing, except your password.
You can then quit Terminal.