I like the sysinternals tools — I use them frequently at work. But, generally? When trying to look at the running Windows processes or how much memory is being used … I need a really small, simple tool that doesn’t add to the bogging that’s already happening. Which is why I hate when people replace taskmgr.exe with the SysInternals task manager on steroids. It’s too much information. The worst part is that the menu option to replace task manager doesn’t un-replace it.
To accomplish that — to revert to the real Windows task manager — you need to edit the registry. Navigate to HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe and remove the key named “Debugger” which points to the SysInternals binary.