May be the driver needs to be updated as well. There could be numerous causes including the fact that the new card may not be compatible.
Make sure the new video card is compatible with the motherboard. Check on the device manager and check for yellow signs on the video card if its yellow try to update the driver if that does not work try uninstalling the video driver and restart the computer. the computer should find the new hardware when you turn it on. Try reinstalling any software that came with the new video card.
if the PC hangs do a "msconfig" to see what programs are running at start-up or check what programs are currently running. maybe the new video card is eating up all the memory.
Do a Ram check, if its not the Ram check for dust inside computer that can also slow down a computer.
however i suggest looking in the memory department.
try connecting all the pieces it could be that the errors and the computer lagging are different things but you never know..
for windows its vista
Write to Microsoft and complain.
Windows 95 was released worldwide.
Windows 2000 Server was released in February 2000, Windows Server 2003 was released in April 2003, Windows 2003 Server R2 released in December 2005, Windows Server 2008 was released in February 2008, Windows Server 2008 R2 was released in July 2009, and Windows Server 2012 was released in September 2012.
Minecraft currently supports: Windows XP - Windows 8. Linux And recently All types of Apple.
Very recently, it was in July 22, 2009
You don't need Windows 9 yet, because Windows 8 hasn't been released yet, so wait until windows 8 gets released to need windows 9...
According to the Vista Style Builder website, the most recent new release by the company was Win7 Style Builder with Windows 7 support. This was released on 26 March 2009.
Windows 95 was released in 1995, August 24th.
Windows 98 was released on 25 June 1998. Windows 2000 was the next release, 17 February 2000.
Thought this short article I recently wrote about Windows 7 would be helpful to you. Thank you Kimberlyhttp://www.ehow.com/how_5551328_decide-upgrade-windows-vista-windows.html
Windows Vista was released worldwide January 2007.