My computer seems to has having viruses...?

there are a few processes in my computer suddenly bcum capital letter,such as LSASS.EXE,CSRSS.EXE,SMSS.EXE, and Explorer.EXE.....my computer will suddenly shutdown...i have scan with my up-to-date antivirus software,but find nothing...how to manually remove it??pls help...

My computer seems to has having viruses...?norton ghost

These are actually names of valid Microsoft processes. There is some spyware/viruses that use the same name. If you manually remove the wrong one your operating system will have to be reinstalled.

Now would be a good time to back up your files.

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Securing a Personal Machine

http://safecomputing.umn.edu/studentchec...

OS Reinstallation vs. Virus Removal

http://safecomputing.umn.edu/guides/rebu...

If you follow all the following steps it should get rid of your problem and prevent future problems. All programs listed are free.

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Update your Full Time (Active) antivirus and run a full scan.

If you do not have active virus protection, install only one. All are excellent.

AVG Antivirus 7.5 Free Edition

http://free.grisoft.com/freeweb.php/doc/...

http://www.download.com/AVG-Anti-Virus-F...

or

Free antivirus - avast! 4 Home Edition

http://www.avast.com/eng/avast_4_home.ht...