operating system upgrade downgrade Not happy with your current operating system? Wish you could upgrade (or downgrade) to another system? Bring it into My PC Clinic in Tempe and Gilbert and we can help you out! If you want to upgrade from Windows XP to Windows 8, purchase the new operating system before bringing it in and we’ll take care of the rest. Trust your operating system change to My PC Clinic and get back to work in no time. Call us today for an estimate and to setup an appointment for your Windows XP upgrade to Windows 8 in Phoenix, Arizona 85048. Complete the form below to receive a call from one of our technicians: