Works On HP with SIS chipset. Check the large chip on the motherboard. If SIS 5597 or 5598 you are in luck. Download and save to a disk. Create a file on drive c (SISvga). Unzip to this file. Run setup in this file. After installed and restatr computer right click on Desktop, go to properties, settings, advanced, adapter, refresh rate. In the pull down box put adapter default.
This worked in a HP Pavilion 4440 with Windows ME. Will work on all Windows O/S