Here is a checklist of some of the standard services performed on your PC:

• Download and install updates for Windows, Antivirus, Antispyware, and Firewall.
• Scan your hard drive(s) for viruses, spyware, malware, adware, worms, dialers, hijackers, keyloggers.
• Data back up.
• Hardware physical inspection and clean up (motherboard, CPU, hard drive, floppy drive, I/O cards, power supply, fans, and vents).
• Uninstall unused and unwanted software.
• Stop unnecessary programs from booting up with the system.
• Clean sweep files, unused data, and registry entries that may be residual from installation attempts.