You don't need VS to get the service installed, nor does it help in any way. Windows still provides you with the command prompt of course. Be sure to start it by right-clicking the shortcut with "Run as Administrator" so you have sufficient rights to modify the registry. Then type the full path of the install command:
cd \where\you\copied\it
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\InstallUtil.exe yourservice.exe
Replace "Framework64" with "Framework" if this is a 32-bit machine. Be sure to get the server admin involved, he probably cares about you making changes to the machine. Most do anyway. And he can be helpful of course, including getting the account+password you need at the UAC prompt.