To Rebuild a Computer

What I would do
Format Hard drive
Re-install Windows, drivers and applications
Optimise system memory settings
Setup Internet connections
Install Windows security patches and fixes
Clean computer internals and clean case exterior
Also install new Bois Battery
And it will be like it New

Spyware

Always do your Anti spyware updates daily
ps I use spybot search and destroy and Adaware Se 2008 and also do your antivirus Updates Daily