I'm looking for a friendly tech helper to clean up my computer and improve its performance. I use a Windows PC with about 250GB of free space and several programs running in the background. The job includes removing unnecessary files, cleaning temporary data, uninstalling unused apps, running a malware scan, updating security software, and optimizing startup processes. Preferences: perform safely, back up important files if needed, and explain changes in simple terms. Ideally, the visit would be hands-on, with clear recommendations for ongoing maintenance and a quick checklist I can follow.