Ошибка и чёрный экран
 

Замучили меня ошибки и чёрный экран.

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: nvlddmkm.sys

DRIVER_IRQL_NOT_LESS_OR_EQUAL

If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:

Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.

If problems continue, disable or remove any newly installed hardware
or 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 Options, and then
select Safe Mode.

Technical Information:

*** STOP: 0x000000d1 (0x00009cd8, 0x00000002, 0x00000001, 0x8c9c9c6c)

*** nvlddmkm.sys - Address 0x8c9c9c6c base at 0x8c810000 DateStamp 0x56ab2b01

Меняйте драйвер NVidia.
При установке в самом начале есть галочка "выполнить чистую установку", лучше её поставить, чтобы убрать старые настройки вашей видеокарты.
Драйвер не обязательно будет работать самый последний, это зависит от слишком многих причин.

Спасибо!Пока работает вроде нормально.Если что напишу.

Синий экран
 

Вот ещё одна вылезла.Что за ошибка?

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: ntoskrnl.exe

IRQL_NOT_LESS_OR_EQUAL

If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:

Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.

If problems continue, disable or remove any newly installed hardware
or 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 Options, and then
select Safe Mode.

Technical Information:

*** STOP: 0x0000000a (0x0000c128, 0x000000ff, 0x00000001, 0x81e433f7)

*** ntoskrnl.exe - Address 0x81f14500 base at 0x81e1a000 DateStamp 0x5760101f