Csrss.exe running 2 instances?

2 instances of csrss.exe is ok. I also have 2 instances and both are running under System user. You can do a quick check. In command line type msconfig.exe and go to Autostart tab. Check wheither you have a line with csrss.exe. If you have one and the path is rather then C:\Windows\System32 then it is a malware. If you don't have a record then everything is ok.