Need a computer cleaning and optimization service for desktop

I’m looking for a friendly tech helper to clean up my desktop computer and improve performance. The PC is running slowly, has several unnecessary programs, and I’d like a thorough cleanup, disk cleanup, temporary files removal, and a basic optimization for startup speeds. Please also check for malware and update essential software if needed. I’d prefer someone who can explain the steps as they go and provide tips for maintenance. Work can be done at my home in Ireland during a daytime slot, and I’d like a clear plan and an estimate before starting.