10.04 Cannot work on my computer

I am currently using ubuntu 8.10 and have just installed 10.04 on another partition.
The problem is that when I login into 10.04, within a few minutes or after some simple operations, the computer stops and gives no responses. This is the same situation when I install 9.10.
However, I can run 8.10 smoothly without any problem.
My computer's config is as follow:

CPU INFORMATION
GenuineIntel, Genuine Intel(R) CPU 2140 @ 1.60GHz
Number of CPUs: 2
CPU clock currently at 1600.046 MHz with 1024 KB cache
Numbering: family(6) model(15) stepping(2)
Bogomips: 3200.09
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl est tm2 ssse3 cx16 xtpr lahf_lm

MEMORY INFORMATION
Total memory: 2016 MB
Total swap: 949 MB
HARDWARE INFORMATION
MOTHERBOARD
Host bridge
Intel Corporation 82945G/GZ/P/PL Memory Controller Hub (rev 02)
Subsystem: Hewlett-Packard Company Device 2a57
PCI bridge(s)
Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01)
Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
Intel Corporation 82801 PCI Bridge (rev e1) (prog-if 01)
USB controller(s)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) (prog-if 20)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01) (prog-if 20)
ISA bridge
Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01)
Subsystem: Hewlett-Packard Company Device 2a57
IDE interface
Intel Corporation 82801GB/GR/GH (ICH7 Family) SATA IDE Controller (rev 01) (prog-if 80 [Master])
Subsystem: Hewlett-Packard Company Device 2a57

GRAPHIC CARD
VGA controller
Intel Corporation 82945G/GZ Integrated Graphics Controller (rev 02)
Subsystem: Hewlett-Packard Company Device 2a57

SOUND CARD
Multimedia controller
Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
Subsystem: Hewlett-Packard Company Device 2a57

NETWORK
Ethernet controller
Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 01)
Subsystem: Hewlett-Packard Company Device 2a57