Can your computer have an item or program be put into it with out your knowledge

5 pts.
Tags:
Computer programming
computer repair
I let a friend use my home computer one day and when I went to use my computer after that it would not accepted my password at first and said there was a attachment on my computer....I rebutted the computer and then it worked fine.....I could not explain what happen after my friend had use it....do you know of any reason why I should be concerned? Thanks! RM

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I would be concerned it that person was truly a friend.

I would ask him what he did. It may not have been done intentionally

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  • TomLiotta
    Because you need to ask the question, it's clear that programs can be installed without your knowledge at almost any time. That's not a negative comment; it merely indicates how complicated computers are. Unexpected installs can be especially true if you have a connection to the internet and you ever enable it. It doesn't matter if a friend uses your system or if you use it. It takes knowledge from training and experience to know what to do, when to do it and how. -- Tom
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  • jinteik
    if it is a program check the add remove program and you can see a list there
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  • ToddN2000
    All program do not end up in the control panel option "add/ remove". If they did it would a lot easier to get rid of spyware, viruses and the like. Even the best security measures have their faults and we get programs loaded against our will via hackers and spamers.
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  • ToddN2000
    Happens all the time. That's how viruses and such end up on our systems. If the control panel option to add/remove showed everything it would be so much easier to remove them. Even the most proactive users still can get hacked and have their systems corrupted. There are evil people out there ...
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  • carlosdl
    Many things could have happened.  For example, your friend could have installed a key logger (a program that records all key strokes and send them to an external place through the internet).  If that was the case, he/she now knows the passwords for your e-mail, facebook, banking and other accounts you access from your machine.
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  • carlosdl
    My last comment disappeared.  Second try: Many things could have happened.  For example, your friend could have installed a key logger (a program that records all key strokes and send them to an external place through the internet).  If that was the case, he/she now knows the passwords for your e-mail, facebook, banking and other accounts you access from your machine.
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