Malwarebytes vs Old Laptop

I have done a Malwarebytes scan on someone's laptop and what I saw 4000+ infected objects. I got to say this person does not take care of their laptop.
I also went to a charity organisation (no name mention) to clean up all those crap because some Admin bring their IT cronies and decide to uninstall Microsoft Security Essentials and Malwarebytes and put on some trial Antivirus which the organisation refuse to pay and it expires.

All the sudden the PC went slow and beyond repairs.
Luckily I have reinstalled Security Essentials and Malwarebytes and when I done Malwarebytes scan I saw 900+ infected objects.
I have never seen such numbers of crap in my IT life.
Luckily Malwarebytes clean the crap out and removed all the plague out of the PCs and now faster than light and clean as a baby's bottom.

If anyone read this I recommend you guys to download Malwarebytes and if you have to pay for it, do it! As it save you a lot of hassle.