Windows XP, SP 2 installed my new G-Force FX 5500 OC Video Card (AGP, 256MB) to IRQ3 which conflicts with other things and causes my display to go crazy with every mouse movement.
Referred by card manufacturer tech support to Microsoft Article 299340, How to force a Hardware Abstraction Layer during an upgrade or an installation of Windows XP. Followed these instructions, selecting the Standard PC with C-Step i486, as the choise of computer type (Dell Dimension 8100, Pentium 4, 1.7GHz) to no avail. Did it twice.
Isn't there a simple way to change IRQ settings any more? Manufacturer suggested I reinstall Windows. Too much invested in current installation. Would take a week of my time to reinstall everything. Told that trying a different video card would likely behave the same way.