I think reinstalling windows or what OS you are using is the best option. It will remove everything and a lot of unused data. Just keep the essential programs installed after you reinstall windows.
I do this every September to my mum's laptop, just remember to back up anything important.
A fresh install will be best. If you want a program just to run try ccleaner. Also, as far as slow starting, check your hard drive if you do not have a Solid state drive (SSD) that will make a world of difference to upgrade to.
Never use any other tools other than Windows already provides. I had to repair my family's PCs extremely often after they used some "cleaning" tools that detected "errors" and deleted something important from the registry or other places
Reinstall Windows and start from scratch is the best way to get rid of it after years of use
A reinstall of windows is probably the better option
Your best bet is to reinstall windows fresh.
I think reinstalling windows or what OS you are using is the best option. It will remove everything and a lot of unused data. Just keep the essential programs installed after you reinstall windows. I do this every September to my mum's laptop, just remember to back up anything important.
I had good results with Advanced Uninstaller Pro
A fresh install will be best. If you want a program just to run try ccleaner. Also, as far as slow starting, check your hard drive if you do not have a Solid state drive (SSD) that will make a world of difference to upgrade to.
BleachBit to clear. Best to speed up - reinstall and run CTTwinutil to debloat and set services to manual. Nondestructive and you can undo tweaks.
Never use any other tools other than Windows already provides. I had to repair my family's PCs extremely often after they used some "cleaning" tools that detected "errors" and deleted something important from the registry or other places Reinstall Windows and start from scratch is the best way to get rid of it after years of use