What "diagnosis" are you referring to? Drivers are for hardware, whereas
csrss.exe is Windows system file.
Also note that csrss.exe has also been identified with the W32.Netsky.AB@mm
worm, the W32.Webus Trojan, Win32.Ladex.a and more. This virus is
distributed via the Internet through e-mail and comes in the form of an
e-mail message, in the hopes that you open it’s hostile attachment. The worm
has it’s own SMTP engine which means it gathers E-mails from your local
computer and re-distributes itself. In worst cases this worm can allow
attackers to access your computer, stealing passwords and personal data. You
should consider virus infection as a possible cause of whatever problem you
are experiencing.