When I logined to my gmail account last night, something popped up showing that my account was logined in some other places. I suspect that my computer was installed with some kind of spy software, trying to peep into my files. For personal reasons, I have several people have access to my computer. I've ever heard that there are some kinds of spy software which are said to be undetectable, like the remote desktop spy software. Is it true? And how can I tell if my computer the spy software?

You can try to run anti-virus software and check processes.

If its a rootkit, it is going to be difficult to detect.

Once a system is compromised, it can no longer be trusted.

Safest way is to re-install.

Do not let people use your computer, especially not with administrator/superuser privileges.

When I logined to my gmail account last night, something popped up showing that my account was logined in some other places. I suspect that my computer was installed with some kind of spy software, trying to peep into my files. For personal reasons, I have several people have access to my computer. I've ever heard that there are some kinds of spy software which are said to be undetectable, like the remote desktop spy software. Is it true? And how can I tell if my computer the spy software?

I'd recommend getting the Anti-Malware Toolkit and checking for malware on your computer.

I'd recommend getting the Anti-Malware Toolkit and checking for malware on your computer.

Thx, Tarun, I will give it a go.

Let us know how you get on.

There's plenty of info in the Lunarsoft Wiki.

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I would recommend a full format and reinstall to be absolutely certain your system is safe. Remember that avoiding viruses and malware is 99% common sense and 1% antivirus, and you don't know what the other users do or consider good practice. Set up a guest account or a regular user account for other people to use; in many cases the default account on Windows/Mac OS X is a full administrator.