Problem with downloading .NET framework and unabe to downoad Windows7 updates

Hi,

I brought a new Windows 10 laptop and an old Windows 7 laptop to a geek
shop, for a simple data transfer including my precious live classical
concerts and photos. (Two years ago, they did a great job on this same
work, which is why I went back there.)Not only did they not do the
transfer, they ruined the new PC, which they sent to H-P for repair. On
the old one, fortunately my data are intact. However,

1)Windows 7 updates do not download, with 3 error messages given,
80070005, 66A, 529, including "access denied".

2) ".NET framework" is absent, and trying to download it leads to a
"fatal error".

Nothing that I gleaned from the net is helpful. I am signed on as
administrator, scans with antivirus and antispyware were done.

Is there a relatively simple way that I can install the .NET framework
and then download the updates to Windows 7?

Any help would be greatly appreciated.

Thanks in advance,

Mort Linder