> For the complete documentation index, see [llms.txt](https://supportx.gitbook.io/buku-mantra-and-sihir/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://supportx.gitbook.io/buku-mantra-and-sihir/trik-sihir/windows/failed-to-install-.net-framework-due-to-certificate-could-not-verified.md).

# Failed to install .Net Framework due to certificate could not verified

While Proceed installation of .Net Framework version 4.7.2/ 4.8, error occurs as below:

Error Message: The timestamp signature and/or certificate could not be verified or is malformed.

This is due to Windows 7 (including SP1) did not ship with SHA2 Support.

<img src="https://s3-ap-south-1.amazonaws.com/ind-cdn.freshdesk.com/data/helpdesk/attachments/production/81065684014/original/FDErTrewoqnmInweKTjlNZtCoSwy2b4mnw.png?1648517841" alt="" width="402">

## Solution&#x20;

To fix this, user need to Manually install SHA2 Support update for Win7, below Solution from Microsoft websites, or download from QNE KB google drive

**For OS 64bit:**\
&#x20;[*https://www.microsoft.com/en-us/download/details.aspx?id=46148*](https://www.microsoft.com/en-us/download/details.aspx?id=46148)\
&#x20;[*https://drive.google.com/drive/folders/1wD2RAXJjEcPyVlAMrmX0ORcF6wqhG9T\_?usp=sharing*](https://drive.google.com/drive/folders/1wD2RAXJjEcPyVlAMrmX0ORcF6wqhG9T_?usp=sharing)

**For OS 32bit:**\
[*https://www.microsoft.com/en-ie/download/details.aspx?id=46078*](https://www.microsoft.com/en-ie/download/details.aspx?id=46078)\
[*https://drive.google.com/drive/folders/124D80rd0XMXeSZNyyiA7ezf3VcbO6ci7?usp=sharing*](https://drive.google.com/drive/folders/124D80rd0XMXeSZNyyiA7ezf3VcbO6ci7?usp=sharing)