When I was on google, a thing popped up in another window. It's called Internent Security Suite and it said there was a trojan trying to get on my computer. It looked authentic, so I clicked install to get rid of it. The moment I realized it had popped up in an internet tab and was fake, it was too late. Now, I am trying to get it off my computer. It keeps popping up saying stuff about identy theft attempt and if I pay 60 dollars it will get rid of the threat. I looked under my add/remove programs but it's not listed there. What do I do?

get AVG... and do a virus scan. that should do the trick

download a programme called Malwarebytes anti malware.

Run a full scan and re-boot

http://www.malwarebytes.org

How to manually remove Internet Security Suite
To remove Internet Security Suite spyware you must block Internet Security Suite sites, stop and remove processes, unregister DLL files, search and delete all other Internet Security Suite files and registry utility. Follow the Internet Security Suite detection and removal instructions below.
The most typical software removal method is to remove Internet Security Suite by using "Add or Remove Programs" service. However there may be hidden Internet Security Suite files, running processes and registries in your computer, so Internet Security Suite may recreate all other files after reboot.
Internet Security Suite manual removal instructions
Stop and remove Internet Security Suite processes:
Internet Security Suite.exe
Uninstall.exe
Read more how to kill Internet Security Suite processes
Locate and delete Internet Security Suite registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Run "Internet Security Suite"
HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Run "Internet Security Suite"
HKEY_CURRENT_USER\Software\Internet Security Suite
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Uninstall\Internet Security Suite
HKEY_LOCAL_MACHINE\SOFTWARE\Internet Security Suite
Read more how to delete Internet Security Suite registry entries
Download RegistryBooster 2010 to scan errors caused by Internet Security Suite
Detect and delete other Internet Security Suite files:
Internet Security Suite.exe
Uninstall.exe