Need quick IT consultancy for miscellaneous computer issue

I'm looking for a friendly IT specialist in Ireland to help with a miscellaneous computer issue. The task is not a full repair but rather guidance and a few hands-on checks to diagnose what's slowing down my PC and to set up a couple of essential programs. Preferences: I’d like remote or in-person help, depending on availability, with flexible timing this week. If in person, the location is Dublin city center. Please outline estimated hours, what you’ll need from me (e.g., access to devices or accounts), and any costs involved. Basic safety and data privacy assurance are important as I’ll be sharing sensitive information. Ideally, you’ll be comfortable explaining steps clearly and avoiding jargon.