I have a HP 522c AMD Athlon 2000+, running windows xp. There is an integrated video card that went bad. So in installed an AGP video card it is a 3D Prophet 4000XT 32 MB. Now that the card is installed when I have it activated there is a code 12 on one of the pci to pci bridges so that my network card in the other pci slots will not work. I have tried the network card on other computers and it works fine, i have also tried the video card and it works fine. I also tried other items in the pci slots while the agp card is in(modem, sound card) and i still recieve the same error. The card works when a pci bridge is enabled but only with the VGAsave driver and with very low quality. When i check the device manager while both pci to pci bridges are enabled, when i can only run the VGAsave driver, it says the there is a conflict under the I/O range with the VGAsave and an Pci to Pci bridge. Any windows updates just delets the pci to pci bridge listed in the device manager. And i have tried all the drivers i could from AMD, HP, Hercules. Any help would be welcomed on how to fix this.