My computer is non responsive.

[stoppy]

This started a few days ago, my computer just froze, nothing was responding, mouse didnt move, everything was just frozen, Only way I could stop it was to turn off then turn back on, then it was fine, then next day it does the same and etc. Please tell me how I can fix this??

 

[hunter315]

Post your full system specs, and make sure to list any hardware or software changes you made in the few days prior to this issue occuring.

Run memtest for a few passes to check for memory errors, use prime 95 to check and make sure your CPU is still fine. Those should tell us if its a hardware issue.

 

[stoppy]

Feature Specification
Operating System1 Genuine Windows Vista® Home Premium (32-/64-bit2)(Service Pack 1)
Genuine Windows Vista® Home Basic (Service Pack 1)
Linpus™ Linux® X-Windows version
FreeDOS™
Processor1 Intel® Core™2 Quad processor (up to 95 W)
Intel® Core™2 Duo processor
Intel® Pentium® processor
Intel® Celeron® processor
Chipset1 Intel® G43 Express Chipset
Memory1 Up to 8 GB of DDR3 1066 MHz SDRAM (dual-channel support on four DIMMs)
Graphics
Intel® G43 on-die graphics solution, featuring:

Intel® Graphics Media Accelerator (Intel® GMA) X4500
Intel® Dynamic Video Memory Technology 5.0 (Intel® DVMT 5.0) support
Microsoft® DirectX® 10 support
Enhanced 3D and Intel® Clear Video Technology support
PCI Express® 2.0 x16 graphics card support (low-profile)
TV-tuner card3 Hybrid analog (NTSC/PAL/SECAM) and digital (DVB-T or ATSC format) TV-tuner card, supporting hardware or software MPEG-2 stream encoding
Audio
Optimized 3rd Generation Dolby Home Theater®4 audio enhancement, featuring Dolby® Inverse Filtering, Dolby® Pro Logic® IIx, Dolby® High Frequency Enhancer, Dolby® Natural Bass, Dolby® Headphone, Dolby® Sound Space Expander, and Dolby® Digital Live technologies5
Embedded high-definition audio with 5.1-channel surround sound support
S/PDIF (Sony/Philips Digital Interface) support

Hard Drive1 Serial ATA hard disk up to 1 TB
Card Reader1
Media card reader supporting:

CompactFlash® (Type I and II)
CF+™ Microdrive
MultiMediaCard (MMC)
Reduced-Size MultiMediaCard (RS-MMC)
Secure Digital™ (SD) Card
xD-Picture Card™
Memory Stick™
Memory Stick PRO™
Expansion bays
One 5.25" drive bay
One internal 3.5" drive bay

Optical Drive1
BD & SuperMulti burner
BD reader & SuperMulti burner
SuperMulti with Labelflash™ technology

I/O Ports
Front:
Multi-in-1 card reader1
Five USB 2.0 ports
High-definition headphone
Microphone-in jack
IEEE 1394 port (4-pin)
Rear:
Four USB 2.0 ports
PS/2 keyboard and mouse ports
Five audio ports
Ethernet (RJ-45) port
D-sub VGA port
HDMI™ port
eSATA port
Optical S/PDIF port
I/O expansion: PCI Express® 2.0 x16 slot
PCI Express® 2.0 x1 slot
Networking Gigabit Ethernet
WLAN3: IEEE 802.11 b/g/Draft-N
56K modem1
BIOS

AMI PnP BIOS compatible with SMBIOS 2.4

Power Supply
220 W

Dimensions
(W × D × H) 265 (H) x 352 (D) x 100 (W) mm (with bezel)
Software Acer Recovery Management
Acer Arcade™ Deluxe6
Microsoft® Office 2007 Trial with Microsoft® Works1
eSobi™
McAfee® Internet Security Suite 2009 (60-day trial)
Adobe® Reader®
Windows Live™ Essentials
CyberLink® PowerDirector™4 DE
CyberLink® MediaShow™ DEX
MyWinLocker®
NTI Media Maker™
Google Toolbar™ and Desktop Search™
System compliance

System compliance PC 2001
Certification FCC, CE, BSMI, CCC, VCCI, CB, Bauart, MET
Optional accessories Acer wireless, USB, or PS/2 keyboard and mouse
Acer LCD monitor

Have replaced intergrated graphics card with a pny 8400 gs, Haven't made any hardware/software changes recently, that I can remember.

 

[stoppy]

What do you mean by memtest and prime95??