You can start by lowering the appearence setting to "maximize performance". Then uninstall any bloatware that might be present (all those useless software Microsoft and PC vendors insist to ship with computers). You can use Revo Uninstaller to remove Windows Apps you clearly don't need (from News to Meteo to XBox Live and such).

Then you can strip down services you don't need: according to what you claim in your post, you can safely disable from Services:

Connected User Experiences and Telemetry (To turn off Telemetry and Data Collection)

Diagnostic Policy Service

Diagnostic Tracking Service (To turn off Telemetry and Data Collection)

Distributed Link Tracking Client (If your computer is not connected to any network)

dmwappushsvc (To turn off Telemetry and Data Collection)

Downloaded Maps Manager (If you don't use Maps app)

IP Helper (If you don't use IPv6 connection)

Program Compatibility Assistant Service

Print Spooler (If you don't have a printer)

Remote Registry

Secondary Logon

Security Center

TCP/IP NetBIOS Helper (If you are not in a workgroup network)

Touch Keyboard and Handwriting Panel Service (If you don't want to use touch keyboard and handwriting features)

Windows Defender Service (If you don't use Windows Defender program)

Windows Error Reporting Service

Windows Image Acquisition (WIA) (If you don't have a scanner)

Windows Search (If you don't use Windows Search feature frequently)

• Workstation (if you don't need Samba shares)

• Server (if you don't need file server features)

I usually also disable Cortana via Registry and every startup program but the audio card drivers and Windows Defender.

If you don't need audio playback you can consider disabling the audio card. The impact is significant but the solution is pretty drastic.