sir wla po tlgang defect yung vga that i sold to u, i have the same issue about installing this vga at the beginning, di po sya madetect ng pc even i already installed the driver, the only trick is to try reseting your cmos or try the plug and unplug routine, but if still doesn\'t work, install a fresh copy of windows... sna nagrequest kau na palitan ko, kya lng naipost nyo na yng negative feedback...