Before jumping ahead with a clean install of Vista, it would be much easier to see if there is actually anything on there.
1. Go to Start > Control Panel > Programs > Uninstall a Program. From here you can see all the programs that have been installed on your computer, if you can make a note of these and list all the installed programs on this thread, we'll be able to see if there is anything monitoring your computer.
2. Turn your computer on from a fresh boot and make sure no applications are running, and open task manager (Either by Ctrl + Alt + Del and selecting task manager, or pressing Ctrl + Shift + Esc). Once task manager is open, go to the Processes tab, on the processes screen, look towards the bottom and click Show processes from all users. From here, if you can make a list or screenshot all the current running processes and list them here.
3. Download an antivirus (Malware Bytes is quite good) Run a full system antivirus scan to see if it's clean.
If you don't want to or can't list everything on the programs list / processes, you can just Google anything you think might look suspicious and then uninstall it if it's monitoring you.
Edited by Phaled, 02 June 2013 - 01:16 PM.