Need help cleaning up my computer and optimizing performance

Hi there, I’m looking for someone to give my computer a thorough clean and optimization. It’s a Windows PC, about 3 years old, and I’ve noticed slower startup times and some clutter from old files and unused apps. I’d like a full cleanup, including removing temporary files, disk cleanup, updating software, organizing files, and optimizing startup programs. Please also check for any malware or unwanted extensions and provide tips for maintaining performance. I’d prefer a calm, patient guide-through approach and can provide remote or in-person service depending on what you offer. If you can do both, I’d appreciate a quick plan and an estimate for the time required.