Don't know if this will help or not but here it is if you want to take a look
I notice that when I first open Task Manager, the CPU % usage value for csrss.exe can sometimes show up anywhere from 33% to 90% for like half a second, then goes down to 0%. When it's around 33%, usually System is around 33% for half a second as well, as is taskmgr.exe.
Is that normal? Do those things boost up like that momentarily just from the process of opening Task Manager?
Thanks for answering yet another weird question for this curious newbie!
THis file is supposed to handle the various threads of data coming in and direct them to the proper place. A quick check will be to click open task manager and go to processes tab in the pop-up menu that appears. There you will see the csrss listing. Next to it will be a listing for memory usage. If this changes a lot,be suspicious.
Also right-click on the csrss.exe and select the end process . If Windows won't remove it,you will know ttat it's the valid one.
Next examine the startup file folder. Right click start and select exlore. In the list of folders in the column on the left of the Windows Explorer that appears,look for startup and open it. If csrss.exe is there, delete it. That may solve the problem.