Hi,
Thank You all for your answers...
I was able to ignore the correpted definitions by changing the name of there file in : C:\ProgramData\Symantec\Symantec Endpoint Protection\CurrentVersion\Data\Definitions\VirusDefs" and then run a liveupdate session (This is not recommanded)
The easieste way is to run a clean weap than reinstall the SEP client.