I do not under stand the CSRSS.EXE and cant find a free removal tool help

That is the client server runtime process, and unless you have reason to believe it is infected, it is perfectly normal to have that file in your processes.
If you think it's overheating, why are you asking about CSRSS.EXE Have you run a full scan for viruses & spyware? Have you checked the CPU temp?
have run norton and notton deep scan and anti malware. A company on the internet that reped themself as a dell agent ( ha ha) ran a sca and said the exe was infected with a trojan . How do I run and ckeck the temp ?
Download, Install, Update, and run Malwarebytes. It is best to install and run it the first time from Safe Mode to help make sure that any threat is not active. Remove anything it finds. I recommend Avast Free Version over Norton.
Install HWMonitor to give you real time temperature monitoring from within Windows.
You have to be a little bit crazy to keep you from going insane.
