If Windows Loader In Not Install In Windows 7 Then Try Below Tricks:

Just look for a file called slmgr.vbs and copy it to windows system32 directory then try running windows loader.exe again

If You Want To Some Windows Activator Now click below Links:

Windows Activator:

1. KMSAuto Easy Windows Activator

2. Permanent Active Windows

3. KMPico Activator 2016

4. Office & Windows Activator