Desktop Windows Manager/Aero WON'T run.dwm.exe crash on restart

Help! Updated drivers via Dell, somewhere along the way Aero is gone, won't run. Upon start up, get message saying "DWM.exe has stopped working and has been closed/ A problem caused the application to stop working correctly, windows will notify you if there's a solution."

Troubleshooters say DWM is not activated, services say it's running, so i restart it, immediately i get the same error message. So DWM will not run and is not running in task manager. The file is still in System 32.
My drivers all say they're up to date. Malwarebytes says all good. i don't know what to do.' Im desperate, i'm stuck on pale blue windows, limited themes.... out of options, and i've tried all the normal go to fixes. I do have the event logs from when i was updating drivers via DELL site. Looks like it started around that time. Not sure if i missed an update or what or if NOT updating something seemingly unrelated would do this.

I hope someone can help or has heard of this. I'll post my general and graphic stats below, if anyone wants to see anything further just ask......

Thanks in advance to anyone that can help me.

Operating System: Microsoft Windows 7 Home Premium 64-bit SP1
CPU: Intel Core i7 3820QM @ 2.70GHz Ivy Bridge 22nm Technology
RAM: 8.00 GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)
Motherboard: Alienware M14xR2 (U3E1) 28 °C
Graphics: Generic PnP Monitor (1600x900@60Hz),NVIDIA GeForce GT 650M,Intel HD Graphics 4000
Hard Drives: 466GB ST9500423AS SCSI Disk Device (RAID),Dev_Cache,Type: Raid 0,Volume: 32GB
Optical Drives: MATA DVD+-RW UJ8A7 SCSI CdRom Device
Audio: Sound Blaster Recon3Di

Graphics: Monitor - Generic PnP Monitor on Intel HD Graphics 4000
Current Resolution: 1600x900 pixels
Work Resolution: 1600x860 pixels; State enabled, primary
Monitor BPP 32 bits per pixel; Monitor Frequency 60 Hz
Device \\.\DISPLAY1\Monitor0
NVIDIA GeForce GT 650M Memory - 2047 MB Driver version: 9.18.13.1422
Intel(R) HD Graphics 4000 Driver version: 9.18.13.1422
OpenGL: Version 4.0.0 - Build 9.18.10.3071
Vendor - Intel; Renderer - Intel HD Graphics 4000
GLU Version 1.2.2.0 Microsoft Corporation
Values: GL_MAX_LIGHTS 8; GL_MAX_TEXTURE_SIZE 8192; GL_MAX_TEXTURE_STACK_DEPTH 10
GL Extensions: Will post on request