How to find out if someone spying on your computer or not

How to find out if someone spying on your computer or not!!Do you think 

someone is spying on your internet activity? Though 

Norton or McAfee might be able to locate spyware, some may be so well-

written as to escape detection. In any case, downloading more software willy-

nilly in an attempt to protect your computer is more likely to make things 

worse. Here are some steps a Microsoft Windows user can take to detect 

spyware activity; Macintosh OS/X, Linux, and users of other operating 

systems 

will have similar but different methods available.

Spying is a very dangerous work the spy or the hacker  may steal important 

data from your computer like passwords,  accounts and credit card numbers so 

you must make sure that your computer is 100% clean from  viruses  and 

keylogers to protect your self from being hacked.

just follow these steps
  
      1- open run command   

     2- type msconfig and hit enter, you will get this

    3- choose startup and check for auto start programs manufacturer.

 if their was unknown program, disable it it may  a virus or a keylogger.  

Or you can use task manager 

Press Ctrl-Alt-Del (all 3 keys simultaneously, known as a "three-finger 

salute"). This should pop up the Task Manager, or whatever Microsoft is 

calling it lately. One of the tabs should be Processes; click that tab.

1. Look up every process name on the Internet. Don't trust all the
   
   information that you find, but try to get a general consensus
   
   from the more reliable sites whether that process name is likely
   
   to be malevolent or not.
2. Even if a process name is normal and expected
   
   (like svchost.exe), it's still possible that a "hacker" was able
   
   to overwrite the normal system process with a tainted one.
3. If a process looks suspicious, for example u-r-0wn3d.exe, you
   
   will need to attempt removal. See Tips for ideas on that
   
   process .That is it you are done!