Necessity of .NET framework 3.5 to run legacy software on windows 10

Direct link to download .Net framework (197MB file size) applicable to 32bit and 64bit windows

Fixing The Errors Installing Microsoft .NET Framework 3.5 In Windows 8/8.1/10

Lenovo Laptop could be tested for monitoring system health and security risks. But, It needs "Lenovo Solution Center" software. To run this software, needs .NET framework 3.5.

Procedure to install .NET framework 3.5

1. Open Group Policy Editor ( Run –>gpedit.msc)
2. Go to the following hive:
   Computer Configuration –> Administrative Templates –> System
3. In the right hand pane, enable the following:Specify settings for optional component installation and component repair