Problems with Computer Freezing

I just got this Brand new Computer, and the same programs I used to use on my old Computer, tend to Freeze on this New One, The Computer came with Vista, and I formatted and Installed XP Pro SAme DAy, Its not Spyware, because I ran all the Programs for that and I just barely got the Computer, and I havent put too much on it, I removed everything from Startup.

It Seems like If I Multitask too much one program will grab onto the computer and take a hold of it, till its job is done, which is annoying, and if I wait it out, than the computer responds to me, sometimes it just freezes permenantly all together, Where I have to hold the Power Button to Turn off and On Again.

Is This a Problem with CORE 2 DUO Chipsets? Because I have a similar problem with my new laptop which is also Core 2 Duo, My Old P4 Didnt Do any of this! And yes I have installed all the chipset Drivers and Everything, Device Manager has no exclamation marks, But I installed everything Perfectly.

Heres my SPECS BELOW:

tem Number Quantity Item Description

223-0777
1 Intel® Core™2 Duo Processor E4400 (2.00GHz, 2MB L2 Cache, 800FSB)

311-7361
1 2GB Dual Channel DDR2 SDRAM 667MHz - 2DIMMs

310-9322
1 Dell USB Keyboard

320-5662
1 Dell 19 inch Widescreen E198WFP Analog Flat Panel Monitor

320-5761
1 128MB NVIDIA® GeForce® 8300GS

341-4989
1 160GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™

341-5000
1 Dell 13-in-1 Media Card Reader

1 Genuine Windows Vista® Home Basic

310-9326
1 Dell Scroll Mouse

430-2501
1 Integrated 10/100 Ethernet

313-5469
1 No Modem Option

410-1100
1 Adobe Acrobat Reader

313-5454
1 Single Drive: 16X DVD-ROM Drive

313-5672
1 Integrated 7.1 Channel Audio

313-5461
1 No speakers (Speakers are required to hear audio from your system)

420-7251
1 Microsoft Works 8. Does NOT Include MS Word

420-7256
1 Norton Internet Security 2007 30-day Subscription

412-0359
983-4250
983-4270
987-6849
987-7137
1 1 Year Limited Hardware Warranty with Next Business Day On-Site Service

420-7367
960-8851
1 1 Year Dell Automated PC Tuneup

420-7277
1 6 Months of America Online Membership Included

420-7189
1 Dell Network Assistant

466-8767
1 Vostro 200 MT

462-4506
1 Purchase is not intended for resale.

310-8625
1 Windows Vista™ Basic



ALSO It says only Compatible with VISTA, Its ok to Run XP PRO RIght?