Need help to change the admin settings

I bought a used dell optiplex 755 from a local community college and need to change the admin settings so I can download the programs and files because it deletes every time on restart.

Do you a big favor and restore the computer to its factory settings.

See: http://www.dell.com/support/Article/us/en/19/SLN291879/EN

If for any reason that does not work (for example, the school removed Dell 'restoration' software), go to the Community College of the it Department and ask them nicely to restore the computer to a functional State.

NB: If after restoring to factory State, you have any software "free trial" - any software particularly virus - be sure to uninstall.  The free trial period will have expired for a long time and the presence of antivirus software, even if idle, can cause a lot of problems.  Most of the antivirus software requires special removal tools provided for free by the Publisher of the antivirus software.  For example:

https://service.McAfee.com/FAQDocument.aspx?ID=TS101331

https://support.Norton.com/SP/en/us/home/current/solutions/kb20080710133834EN_EndUserProfile_en_us

Tags: Windows

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