Freezing and Slow

Finally got MacBook Pro for work (bye bye dell) and I am having both Freezing and Slowness problems. Machine info: MacBook Pro 15", 2.4Ghz core 2 duo, 2GB Ram, 200GB HD (108GB used), FileVault, OS X 10.4.11, Parallels (typically not running any longer). All original HW, nothing changed/added. All SW is updated to latest versions, patches, etc.
The system freezes under two conditions I can repeat (sometimes). By freezing I mean nothing from the trackpad or keyboard impact anything (i.e., cursor will not move and things like cmd-opt-esc do not yield Force Quit window). No response from a plugged in external mouse either. Must press and hold power button to reboot. Any windows that had something moving (i.e., entourage progress bars) stop moving. First case is when I plug in an external display. Only plugging in external VGA, not DVI, so using apple adaptor cable. Sometimes the machine immediately freezes; other times it freezes exactly when I press the Detect Displays in the Displays System Preferences pane. The second case is after I change network setting Location from within the Network System Preferences Pane (i.e., from supporting Verizon USB EVDO to Ethernet). The computer freezes when I press Apply Now after changing Location. Note that in both conditions, the computer does not always freeze. If I reboot and try again (changing locations or driving external display) the computer does not freeze and expected actions work.
The computer otherwise will get VERY slow from time to time. (To the point that I want the dell back!) By slow I mean clicking on an application window in the background and waiting a minute or more for the application window to come to the front. Or having typed text in a variety of applications show up 20 to 40 seconds after I type. When I check Activity Monitor or run Top in Terminal window, the CPU typically is not beyond 20% usage. Changing to Better Performance in the Energy Saver System Preferences Pane has no impact. I have not found any firm correlations here to other actions. It does often happen for 15+ minutes after I bring the computer out of sleep mode; sometimes after I come out of screen saver; and more infrequently it just gets slow while working. I now reboot when it gets slow and the machine works again. Uptime is no more than 2 days at a time at this point (pathetic given my iMac G5 stays up 60 days without reboot).
I have AppleCare on the macbook pro, but was hoping not to have to send it in. If I do this I have to wipe my documents folder first due to data sensitivity. Could go to Apple store for Genius to look at.
I have tried reseting PRAM, HD permissions fix in Disk Utility, and allowing FileVault fix the unused space issue (Apple, put in a time indicator on this!). No help.
Any suggestions?
-David.

Hi,
Could it be indexing your files by Spotlight?
Or TimeMachine on a slow external disk?
Try with WhatSize, this app will tell you if you have enormous log files that might slow some operations.
I have some slow issue from time to time. Most are related to having too many operations at the same time (5-8 running softwares) with big database and huge download while Time Machine is backing up. Usually, quitting some apps and rebooting works for me. If not, I run Cocktail.
Regards,
Charles

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Freezing and Slow

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