ouc process running at 98% CPU
Given ouc is not a process that ships with Mac OS X it appears a third party product is causing the problem.

Searching the web suggests ouc is embedded within an application called "Mobile Partner.app".

If you have this application, please report the problem to the developers.

Manual Removal

It is always better to use the removal process provided by the developer; however, if Mobile Partner does not provide a removal tool, you might like to disable the ouc process manually.

You mention force quitting results in an immediate relaunching. This suggests the ouc process is managed by a launchd job ticket. launchd is a watchdog process that will monitor processes and relaunch any that run into trouble - such as crashing or being force quit.

Take a look in the following folders for a launchd job ticket associated with ouc:


~/Library/LaunchAgents
~/Library/LaunchDaemons
/Library/LaunchAgents
/Library/LaunchDaemons


The files in these folders are text files and can be read using TextEdit or a dedicated text editing tool, such as TextWrangler.

If you find a file mentioning ouc, move it out of the parent folder and restart.

As @oma mentions, if you can not find a launchd job ticket, look inside /Library/StartupItems for a folder or file containing ouc. Delete the ouc folder and restart.