CPU Usage 75%-100%

Whenever i start a program my CPU usage goes to 100%, while moving my mouse it goes to 75% my computer is constantly laggy/glitchy not freezing or graphic glitching just very slow i have ran Windows XP fine before on this computer but i reformated due to problems on the old installation of XP but after format my computer runs like this my specs are,
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Operating System:
Windows XP Professional (build 2600) (No Service Pack Yet)
(Does The Same Thing When The Service Packs Are Installed)

Processor:
700 megahertz Intel Celeron
32 kilobyte primary memory cache
128 kilobyte secondary memory cache

Drives:54.26 Gigabytes Usable Hard Drive Capacity
31.36 Gigabytes Hard Drive Free Space

LG CD-ROM CRD-8322B

Maxtor 32049H2 [Hard drive] (20.49 GB) -- drive 1, s/n L20M3TKC, rev YAH814Y0, SMART Status: Healthy
SAMSUNG SP0411N [Hard drive] (33.82 GB) -- drive 0, s/n 0611J1FW603069, rev TW100-07, SMART Status: Healthy

Controllers:
Standard floppy disk controller
Intel(r) 82801AA Bus Master IDE Controller
Primary IDE Channel [Controller]
Secondary IDE Channel [Controller]

Display:
3D Prophet 4000XT PCI [Display adapter]
Intel(r) 82810 Graphics Controller [Display adapter]
Packard Bell NEC CI A726 [Monitor] (15.7"vis, August 2000)

Bus Adapters:
Intel(r) 82801AA USB Universal Host Controller

Multimedia:
Intel(r) 82801AA AC'97 Audio Controller

Other Devices:
PC/AT Enhanced PS/2 Keyboard (101/102-Key)
Microsoft PS/2 Mouse
Generic USB Hub
USB Root Hub

System Model:
Packard Bell NEC 00000000000000000000000 p270101158
System Serial Number: 005656220141
Asset Tag: 0123ABC
Chassis Serial Number: 50424E
Enclosure Type: Desktop

Main Circuit Board:
Board: Gigabyte i810 1.3A
Bus Clock: 66 megahertz
BIOS: American Megatrends Inc. 3.0C 09/25/2000

Memory Modules:
256 Megabytes Installed Memory
Slot '0' has 128 MB
Slot '1' has 128 MB

Local Drive Volumes:
c: (FAT32 on drive 0) 33.79 GB 30.50 GB free
d: (FAT32 on drive 1) 20.47 GB 858 MB free
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I've tried alot of things to fix this.. nothing works i've even taken my whole computer apart and put it back together again .. and still nothing no luck at all.. i've installed norton and scanned.. found nothing.. i've done everything i can think of.. now i come to whoever can help me fix this... thanks

 

Cpu usage at 100% while opening a program is good because it means the cpu is being utilised for the task.It is normal.If you think there is a slow down you might like to disable some startup programs and services that run in the background.What are the programs you run in the tray?Also what anti-virus and spyware programs are you running?You celeron is a bit outdated too.

 

Well it does slow down.. and it's even when i move the mouse it just lagg's .. uhmm.. like i said i just reformated.. it's all new i got nothing running in the background.. even when i did it still did it... i've reformated almost 20 times in the past 2 weeks.. and i just instaled ServicePack2 and things are still the same.. i got like 2 programs running in the background that are from startup.. soo...i don't know.. and how would i go by upgrading my celeron thingy..

 

2 Process managers that may help.

http://www.diamondcs.com.au/downloads/cmdline.zip

 

I'm not to sure what to look for in this thing... i'm sure everything is normal.. it just glitches up my music also when i run a program ... and even when i move my mouse fast it does it.. i'm not to sure what i'm looking for in this problem.

 

Have you installed process Explorer? If not, I suggest you do it. What are the top 2-3 CPU users? Bazza

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I'm not to sure how to read this thing but here is a image of it..
http://img204.imageshack.us/img204/8264/haa2wg.png

 

Maybe you can disable microsoft antispyware real time.Just do a scan ever two days.

 

when i had nothing in the background at all it did this thing to me.. ok?

 

Your cpu time is being used for the rights process,so there is no way we can improve on that,look at your memory.Does your system recognise 256mb?Also check for memory leaks.Take control panel>admin tools>performence.Add a counter for memory>available bytes.See how much the graph shows.Also get the latest drivers for your hardware.

 

Damn.. i thought i knew alot about computers.. but when it gets to certain things i can't do anything about it.. but all should be good i'm installing Windows XP with a new CD maybe this works...