I installed Kaspersky Antivirus 2010 on my husbands computer last night .... Kaspersky keeps giving off a warning that there is a threat called

Win32.agent.bdov

the threat has something to do with a Rootkit Win32.agent bdov

the file in question is this - windows\system32\drivers\akxcsonf.sys

there is also another files which I think is connected with this
windows\ogilusas.dll

I have tried to clean these files and it says they are cleaned but within 20 minutes of restarting the computer to complete the cleaning process the threat warning comes back .... I have gone into the windows folder to try and delete these and it won't let me delete them ...
can someone please help me get rid of this ...

thank you so very much