My problem is the overusage of CPU in windows 7. The performance tab in task manager shows a very high usage level, usually more than 50% usage. But in the processes tab it shows an ordinary situation and just some processes with 2 or 3 percent of usage. Also the system is not working in a light way. Is it a hidden software? and how can I solve this problem?
Based off your comment that you did the
Show processes from all users and found that
syshost.exe is eating your CPU I did a quick look and most of the results point to a Trojan on the system. I would recommend getting a good virus scan done to remove it.