cpu 100% all the time

Download HijackThis and run it and then go to the site below to analyze it to find out if you are infected.

http://aumha.org/downloads/hijackthis.exe

HijackThis log file analysis

Hijack This opens you a possibility to find and fix nasty entries on your computer easier. Therefore it will scan special parts in the registry and on your harddisk and compare them with the default settings. If there is some abnormality detected on your computer HijackThis will save them into a logfile. In order to find out what entries are nasty and what are installed by the user, you need some background information.

A logfile is not so easy to analyze. Even for an advanced computer user. With the help of this automatic analyzer you are able to get some additional support. Just paste your complete logfile into the textbox at the bottom of this page. Due to a few misunderstandings, I just want to make it clear that this site provides only an online analysis, and not HijackThis the program.

http://hijackthis.de/

You can also try this.
Download Malwarebytes Anti-Malware, install it and update it and scan the PC's.

http://download.bleepingcomputer.com/malwarebytes/mbam-setup.exe

< Typo >

Keep us informed as to your progress if you require further assistance.

If you think that any of the posts that have been made by all TR Members, have solved or contributed to solving the problem, please Mark them as Helpful so that others may benefit from the outcome. ;) :D

http://www.cpukiller.com/
This will bring your CPU down a bit.

Please post back if you have any more problems or questions.
If this information is useful, please mark as helpful. Thanks.

I'm not sure if your running this program
already, but if not try it out I'm sure
you'll love it. This program gives you more
insight to what's running than the normal old Task Manager. This should help you narrow down your search.

"Process explorer" Here's the link

http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx