Not usually. You may need the specific version. For 4.5.2, download that standalone installer instead. Final Tip After installing, run Windows Update to install any security patches or hotfixes for .NET Framework 4.5 on your 32-bit Windows 7 system. Need help? Leave a comment below (if on a blog) or consult the official Microsoft .NET Framework support documentation.
No, but .NET 4.5 is an in-place upgrade that replaces 4.0. You do not need 4.0 installed first. Not usually
Yes. The file dotNetFx45_Full_x86_x64.exe works on both 32-bit (x86) and 64-bit (x64) systems. Not usually