Most likely the computer is at service pack 1 or 2, which are no longer supported by Microsoft. Please see this Microsoft Community thread entitled "Error number: 0x80244019 in Windows XP Home SP2" for a possible resolution to your issue.
BTW: I still have an HP a1632x.... runs Windows 7 6-bit with 4GB RAM and and HP OEM Radeon HD 6450 graphics cards.
Please send KUDOs