A high-tech computer tune-up is like a mountain spa retreat or month-long detox for your computer. Over time, the average personal computer accumulates a buildup of dust, viruses, spyware, and pigeon feathers that contribute to loss of power, incorrect shutdowns, and slow-running programs. The computer tune-up works on all these problems, determining the status of available virus protection and scanning for existing threats. Registry files are optimized, and unnecessary temp files, cookies, and unused programs removed. Erroneous start-up files are eradicated like so many reality-show contestants, while service packs and security updates are installed. The technician will also create a backup of your Windows registry and even clean the CD-ROM laser lens for an extra bit of personal polish.