Unable to Update/Repair/Remove .Net Framework 4.5 Error Code 66A

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  1. Posts : 5,605
    Originally Win 7 Hm Prem x64 Ver 6.1.7600 Build 7601-SP1 | Upgraded to Windows 10 December 14, 2019
       #31

    How do you feel about doing a repair install as suggested by SIW2 earlier?

    SIW2 said:
    You could try a repair install

    Repair Install
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  2. Posts : 51
    Windows 7 Home Premium 64bit
    Thread Starter
       #32

    will everything be gone? cause i dont want that to happen. i have too much things in my computer.:/
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  3. Posts : 21,482
    Win 7 x64 Home Premium (and x86 VirtualBox VM)/Win10
       #33

    There is always a risk with such a procedure, so back up to external media first.

    However, in theory, a repair install should leave all programs installed, and data intact - although a few settings will revert to their default state, and may need to be adjusted.
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  4. Posts : 5,605
    Originally Win 7 Hm Prem x64 Ver 6.1.7600 Build 7601-SP1 | Upgraded to Windows 10 December 14, 2019
       #34

    As Noel has pointed out, there is always that risk when doing a repair install. Please prepare, and read to accustom yourself to the Information, Note, Tip boxes and steps for the procedure.

    You can print out the tutorial, but you will lose the visual aids that Brink added to the tutorial after certain steps to help show what you should be looking at. If that is a concern you can use a screen capture program to capture a complete tutorial.

    As long as you have your Data and Programs backed up, the installation disks for any Device Drivers and are prepared for the procedure you should be okay.
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  5. Posts : 51
    Windows 7 Home Premium 64bit
    Thread Starter
       #35

    i've done repair install, but still having the same problem.. :/
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  6. Posts : 5,605
    Originally Win 7 Hm Prem x64 Ver 6.1.7600 Build 7601-SP1 | Upgraded to Windows 10 December 14, 2019
       #36

    We need you to be more specific.

    Which same problem are you having, the 66a, 0x800106BA or 80072f78?
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  7. Posts : 51
    Windows 7 Home Premium 64bit
    Thread Starter
       #37

    sorry, the 66A problem.
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  8. Posts : 5,605
    Originally Win 7 Hm Prem x64 Ver 6.1.7600 Build 7601-SP1 | Upgraded to Windows 10 December 14, 2019
       #38

    I see by your system specs you have two HDD's installed, WD Green 2TB, and a Plextor 250gb SS.

    Where do you have the operating system installed, the WD or plextor?
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  9. Posts : 51
    Windows 7 Home Premium 64bit
    Thread Starter
       #39

    i installed it in plextor. do u think i should try installing it in my WD instead?
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  10. Posts : 5,605
    Originally Win 7 Hm Prem x64 Ver 6.1.7600 Build 7601-SP1 | Upgraded to Windows 10 December 14, 2019
       #40

    My apologies for the delay, life intervened.

    I wanted you to do a CHKDSK on the drive you had the OS installed on, and for the earlier model SSD's there is a risk involved. I looked, but couldn't tell if Plextor has a chkdsk for their SSD's.
    If you have an M1 or M2, I don't know for sure what would happen, but if you have an M3 or M5 then I'd say it should be okay to run Windows Disk Check on your SSD, you just shouldn't run defrag's. With anything there is always a risk.

    From earlier repair attempts you should have backups of your personal information, if you don't have any backups for the SSD, you should make one before you attempt this.

    Follow Option One, Step 7: https://www.sevenforums.com/tutorials/433-disk-check.html

       Note
    There is a lot that can happen doing a CHKDSK on a SSD more than I can explain here. If you don't mind waiting a bit, let me ask for more help.

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