我点windows+L锁定计算机的时候，总出现蓝屏，求助大家该怎么办

重新装了显卡驱动 和 Directx 9.0 C 后，依然 DirectDraw 加速 已禁用，Direct3D 加速 不可用 ，AGP纹理加速 不可用。
A problem has been detected and windows has been shut down to prevent damage to your computer 。
The problem seems to be caused by the following file:nv4?disp.dll page FAULT-IN-NONPAGED-AREA
If this is the first time you‘ve seen this stop error screen,。Restart your computer. If this screen again, follow these steps,Check to make sure any new hardware of software is properly installed. if this is a new installation, ask you hardware of software manufacturer for any windows updates you might need .
If problems continue disable or remove any newly installed hardware of software .Disable BIOS memory options such as caching or shadowing .if you need to use safe mode to remove or disable components。 restart your computer ，press F8 to select Advanced startup option and then select safe Mode .
STOP: 0X000 000 50(0XE166081C, 0X000 000 00, 0XBF2A063D, 0X000 000 01)
nv4-disp.dll-address