csrss.exe is using 80% of my resources. How can I stop this

csrss.exe is the main executable for the Microsoft Client/Server Runtime Server Subsystem. This process manages most graphical commands in Windows. This program is important for the stable and secure running of your computer and should not be terminated.

Note: csrss.exe could also be a process which is registered as a trojan. This Trojan allows attackers to access your computer from remote locations, stealing passwords, Internet banking and personal data. It could also be a registered security risk and should be removed immediately.

Please post a hijackthis log for the experts to look at.
Please follow the instructions here and then post your log in a new thread of the Spyware, Adaware, Viruses and hijackthis logs section.
(Not in this section please.)

Please specify what issues you appear to be experiencing along with your log.