CPU usage at 100%

[Xeis 0]

Ok, I'm not too good with computers so I had my friend help me install a new video card and some more memory, but it seems like it hasn't changed. Now my cpu usage is at 100%, even just using mozilla. Please if you can... help me.

 

I have a:

Microsoft Windows XP Home Edition

5.1.2600 Service Pack 2 Build 2600

Dell Simension 2350

Processor x86 Family 15 Model 2 Stepping 7 GenuineIntel ~2192 Mhz

BIOS Version/Date Mitac International A02. 3/24/2003

SMBIOS Version 2.3

Total Physical Memory 1,024.00 MB

Available Physical Memory 698.23 MB

Total Vitual Memory 2.00 GB

Available Virtual Memory 1.96 GB

 

I upgraded from 128 MB RAM to 1 GB RAM

and I had a Intel Intergrated Extreme Graphics Card to a ATI RADEON 9250 Saphirre 256 MB

 

I hope this helps.