decrypt encrypted files error

ok sir, i seriously need help or information regarding my situation so plzz plzz help. i had some files colored green for 1-2 years but i ignored it as i didnt knew what it meant. i thought it was jst a random thing like changing icon or something. now that i ve realized that it is encyrpted and cant copy it or open it i dont know what to do. seems my kid sister messed it up accidently few years ago :´( as when i go to the properties>advanced then there´s her name under the "users who can access this file" since then i have change my O.S many times and every time those files were there colored green. right now i am using win 8.1 i dont understand this certificate or key stuff but still after reading a few article when i tried to click the option "back up keys" it shows erroe that the certificate or key is not availiable for export on this machine. now sir, plzz tell me what r my options and what can i do. if i cant do anything then at least tell me that so that i can hard reset my hdd whith no hope. thank u very much sir

Hello Shawn, and welcome to Seven Forums. :)

If you didn't backup the EFS certificate before installing Windows 8.1 and importing the certificate afterwards, then I'm afraid that you lost access to the encrypted green file.

If you like, you can just delete them.

You're most welcome. I'm glad that we have been able to help. :)