Hello Nazia Ashraf, happy to help clarify a couple of things here.
First — the Microsoft Store isn't missing on your PC; it was never part of Windows 7. The Store first shipped with Windows 8 in 2012, so on Win7 the only way to install programs is from a disc or by downloading the installer directly from the publisher's website.
Second, and more importantly: Windows 7 reached end of support on 2020. It hasn't received security or quality updates in over six years, which is why a lot of modern installers and games simply refuse to run on it now — missing TLS support, expired root certificates, or runtime requirements (newer .NET / Visual C++ / DirectX) that Win7 can't satisfy. The recommended path is to move to Windows 11 if your hardware supports it, or replace the PC.
If you'd still like to try installing something specific on Win7, could you share:
- The exact program you're trying to install
- The exact error message (a screenshot is ideal)
- Whether it's from a disc or a downloaded installer
With that I can take a closer look. But please be aware that even if we get one program working, Win7 is no longer a safe platform to keep using day-to-day.