Hello this tutorial will fix the “your trial period has expired” error you get on TeamViewer, if you follow the steps and do it correctly.
I will keep it as short as possible, to not make it look confusing.

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  1. Uninstall TeamViewer from your system.
    Go to Control Panel>Programs>Programs and Features
    Or you can open “Run”and type “appwiz.cpl” and find TeamViewer entry, then uninstall it
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  2. Delete the folder named “Teamviewer” from “C:\Program Files\Teamviewer” or “C:\Program Files\Teamviewer (x86)”.
    By browse to “C:\Program Files” or “C:\Program Files (x86)” (If you have x64 of windows installed)
    and delete the folder named “Teamviewer”
    Or you can open “Run”and type “%ProgramFiles%” and delete the folder
    Or you can open “Run” and type “%ProgramFiles(x86)%” (If you have x64 of windows installed) and delete the folderSketch.png

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  3. Delete “Teamviewer” folder from C:\Users\{username}\AppData\Roaming.
    Open “Run”and type “%appdata%” and delete TeamViewer folder
    Sketch.pngSketch2.png


  4. Delete “Teamviewer” entries from Registry.
    By open “Run”and type “regedit” and delete the following entries:

    • HKEY_CURRENT_USER -> Software->
      then find Team Viewer Entry and Delete it.Sketch.png
    • HKEY_LOCAL_MACHINE -> Software -> or
      HKEY_LOCAL_MACHINE -> Software-> WOW6432Node
      then find Team Viewer Entry and Delete itSketch2.png


  5. Change MAC address of your Computer.
    Open “Run”and type “ncpa.cpl” and find your archived adapter then >Right Click on the adapter > select “Properties” > on the Tap “Networking” select “Configure” > then open the Tap “Advanced” > on “Property” select “Network Address” > and Change the Value.
    Or you can use an 3rd part application like “SMAC” to edit your MAC address
    and you can download it from here (Download SMAC).
    Sketch.png


  6. Restart your machine
    (Note: All step compulsory to follow. If you miss any step it may be not work)


  7. Install A fresh copy of TeamViewer
    You can download it from the official website or you can download it directly from here (Download TeamViewer)



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