Has someone accessed my computer?

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Security
How can I check if anyone else has be accessing my computer/network?

Software/Hardware used:
my email always giving failure to sign in after few days, resign in and change pw

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It’s almost always a good idea to reset the system – reinstall Windows, etc. – when something like this occurs. It’s the only way to clean up malware infections. Changing your computer and important web passwords is not a bad idea either.

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  • Subhendu Sen
    Is there any abnormalities? Like suddenly restart the system/a software/program eats huge memory etc. What symptoms are there? Have you installed an antivirus? Is it Updated? Are you taking backups regularly? What OS is there?
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  • ToddN2000
    You might want to get a network monitoring app to see what is going on. A lot of routers will also provide some tools as well. What type of router are you using?
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  • Subhendu Sen
    Change computer password immediately with complex one. Check settings if the computer's Remote setting is enabled. If yes, disable it.
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  • ToddN2000
    Use a strong password.
    If you use passwords with things like birthdays, anniversaries or other special significance they make it easier for people to crack. The same goes for the names of family members, pets, ex's or the 
    type of car you drive or favorite vacation spots. 

    Too many people use these because they are easy to remember. 
    The problem is if you post anything to social media on those 
    dates or photos tagged with the name it's even easier to crack your password. You should be using a password of at least 8 to 10 characters and use mixed case, upper and lower and even use a few special characters. Each special char and extra char use in the password makes it exponentially tougher to crack.

    You should also never use the same password on multiple sites. 
    If someone does get into an account, say your email, they can go to other site of yours and ask for a password reset. 

    It then gets sent to that email address and they can change it and lock you out of you accounts or worse. It's scary to think but it  happens. It gets worse the more we use different social media accounts and expose personal information. 

    If you feel you have been hacked, run some anti virus software.
    Then change all of you password accounts.
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  • Subhendu Sen
    Before re-installing OS or perform clean install, take all necessary backups (personal files, photos etc.) & then go for that. However, you can check the system with a anti virus tool, called MWAV (a small tool and free to use) which can runs and clean the system, if any. No installation of this tool is required. For better result, reboot the system in Safe Mode then run this utility, When runs, select all drives and select full scan. It takes time depending on your drive's size or files/ folders etc. Before going re-installing OS, you can try this one, it might be helpful for you.
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