yeah well i've done first too, not sure how/what you meant by last one?
You mean: setting your screen resolution at a lower setting?
1. Open Display in Control Panel.
2. On the Settings tab, under Screen resolution, drag the slider, and then click Apply.
3. When prompted to apply the settings, click OK. Your screen will turn black for a moment.
4. Once your screen resolution changes, you have 15 seconds to confirm the change. Click Yes to confirm the change; click No or do nothing to revert to your previous setting.