Horizontal White Lines on Screen, Some times bsod when I try log in.

Sounds like a video card issue.

Go through the steps mentioned on this thread: STOP 0x116: VIDEO_TDR_ERROR troubleshooting

Code:

*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 116, {fffffa800a7ab4e0, fffff880131d2a88, 0, 2}

Probably caused by : Unknown_Image ( ANALYSIS_INCONCLUSIVE )

Followup: MachineOwner
---------

0: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

VIDEO_TDR_FAILURE (116)
Attempt to reset the display driver and recover from timeout failed.
Arguments:
Arg1: fffffa800a7ab4e0, Optional pointer to internal TDR recovery context (TDR_RECOVERY_CONTEXT).
Arg2: fffff880131d2a88, The pointer into responsible device driver module (e.g. owner tag).
Arg3: 0000000000000000, Optional error code (NTSTATUS) of the last failed operation.
Arg4: 0000000000000002, Optional internal context dependent data.

Debugging Details:
------------------


FAULTING_IP: 
+0
fffff880`131d2a88 0000            add     byte ptr [rax],al

DEFAULT_BUCKET_ID:  GRAPHICS_DRIVER_TDR_FAULT

CUSTOMER_CRASH_COUNT:  1

BUGCHECK_STR:  0x116

CURRENT_IRQL:  0

STACK_TEXT:  
fffff880`0799b9c8 fffff880`06f47000 : 00000000`00000116 fffffa80`0a7ab4e0 fffff880`131d2a88 00000000`00000000 : nt!KeBugCheckEx
fffff880`0799b9d0 00000000`00000116 : fffffa80`0a7ab4e0 fffff880`131d2a88 00000000`00000000 00000000`00000002 : 0xfffff880`06f47000
fffff880`0799b9d8 fffffa80`0a7ab4e0 : fffff880`131d2a88 00000000`00000000 00000000`00000002 00000000`00000000 : 0x116
fffff880`0799b9e0 fffff880`131d2a88 : 00000000`00000000 00000000`00000002 00000000`00000000 00000000`00000000 : 0xfffffa80`0a7ab4e0
fffff880`0799b9e8 00000000`00000000 : 00000000`00000002 00000000`00000000 00000000`00000000 fffff880`06f46d0a : 0xfffff880`131d2a88


STACK_COMMAND:  kb

SYMBOL_NAME:  ANALYSIS_INCONCLUSIVE

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: Unknown_Module

IMAGE_NAME:  Unknown_Image

DEBUG_FLR_IMAGE_TIMESTAMP:  0

FAILURE_BUCKET_ID:  X64_0x116_ANALYSIS_INCONCLUSIVE

BUCKET_ID:  X64_0x116_ANALYSIS_INCONCLUSIVE

Followup: MachineOwner
---------

Hello, you might power off and pull out and replace your GPU card. Sometimes they get dirty or loose and this helps. Also remove and replace any power connectors it might have.

Use Driver Sweeper (link in my sig) to uninstall your graphics driver and install the newest one.
Latest NVIDIA ForceWare Video Drivers Windows 7

Lets see what we are working with. Add you PSU info from the label on it.
To better help us to help you would you please add your systems specs? Here's how:SystemInfo See Your System Specs Under System Manufacturer/Model Number add whether it is a desktop or laptop and whether self built. Very important

Log in to Seven Forums and you will be able to transfer the info directly to the specs page in your profile from within the System Info app.

After doing this your specs will be available in each of your posts.
Click on My system Specs in the lower left of this post to see how it should look.:)
Full instructions are in the tutorial.

That's a good start, laptop, desktop, home built or bought, model number? Also the PSU info, to see if it may not be up to snuff for your system.