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Istiaque_235
I renamed the NTUSER.dat file to NTUSERold.dat in the following location: C:\Users\Default, after encountering the error 'The User Profile Service service failed the sign-in'. To resolve this issue, I copied the NTUSER.dat file from the directory C:\Users\My Username. However, I am now unable to access the boot menu, and my MS Office is showing 'Product Activation Failed', even though it was previously activated. How can I resolve these issues?
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