Packed.Generic.200... Again!!!!!!

I seem to have acquired this virus earlier on today, and i have spent hours now reading through this forum and other sites looking for a solution. NIS 2009 detects it on start up, but cannot remove this, which is extremely frustrating. It has the path that begins globalroot\systemroot\system32\uacnmtdjiwlkopexlh.dll (currently 8 files with this name)

 

 I have downloaded malwarebytes and superantispyware but they simply will not run once they are downloaded, a problem another member had i noticed.  I have picked up viruses in the past and after some research i have found the solution but this one seems to have me beaten :(

 

My NIS2009 is fully up to date so are my windows updates. My operating system is XP

 

Any help will be gratefuly received, From the number of posts i am seeing, Packed.Generic.200 seems something of a problem to Symantec :/