To install the Windows default Standard PCI driver, navigate to Control Panel - Display Properties. Move to the Adapter tab in video properties (under Advanced in Win 98-ME) and hit the Change button. Then choose the “Display a list of drivers …” selection, highlight “Show all hardware” and then select “Standard PCI Graphics Adapter” under the Standard Display Types grouping. Ignore the warning and load the driver, but do not reboot at this time.
If you are running Win 98 or higher, you can also save a few steps by simply deleting the video card itself under System Properties - Device Manager. Click on Display Adapters and then highlight your card and click the Remove button. Again, this is not recommended with an older OS like Win 95, as it may cause some problems. Either way, do not reboot immediately afterwards, since the card-specific drivers may load up automatically when the PC starts up.