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Try using this method to fix the 0x800705b4 error and it may work for you.
Her articles give you quite a few possible solutions to your computer problems, and with step-by-step instructions and illustrations show you how to navigate on your PC until your problem would be resolved. Many Windows users have been there, and most of them managed to fix the issue by using one of the methods below.
Just as many roads lead to Rome, there may also be many solutions to a technical problem; if you have any other suggestions, you're more than welcome to share them with us. You can work your way down the list until you find the one that works.
Don’t worry, generally, you’re able to start your PC in Safe Mode with networking to sort out the issue.
If you don’t know how to boot your computer into Safe Mode, you can refer to this article — remember to press the 5 number key to enter Safe Mode with networking.
You can fix the error with one of the methods below.