Halo 2 troubles

[Dragonkiller365]

I am trying to install Halo 2 onto my computer but when i try to load it up the message, "The procedure entry point CreateProcessWithTokenW could not locate the dynamic link library ADVAPI32.dll." came up. What do i do so that i can install it?

 

[MrNeeds]

advapi32.dll is a part of an advanced API services library supporting numerous APIs including many security and registry calls, if this process is corrupted, then you will need to do either a system restore to when your computer started having performance issues or a repair install of vista to recover any files lost or corrupted due to viruses.

 

[Dragonkiller365]

so how do i repair my vista?

 

[MrNeeds]

go here http://www.vistax64.com/tutorials/88236-repair-install-vista.html