Garry's Mod Won't Launch

Hey guys,

Just today, every time I launch Garry’s Mod, it goes to the solid blue screen with the black “Loading…” box in the lower left corner for about 2-3 seconds and then it closes.
No error message.
No logs.
No dump files.

I just played yesterday and everything was working just fine.

I have verified the cache. I have completely deleted Garry’s Mod and reinstalled it. I tried some launch command lines that reduce the video settings.
Nothing works.

Please please please help me.

Computer Specs:

Processor Intel® Core™ i7-4770K CPU @ 3.50GHz
Manufacturer Intel
Speed 3.5 GHz
Number of Cores 8
CPU ID BFEBFBFF000306C3
Family 06
Model 3C
Stepping 3
Revision
Video Card NVIDIA GeForce GTX 770
Manufacturer NVIDIA
Chipset GeForce GTX 770
Dedicated Memory 2.0 GB
Total Memory 3.9 GB
Pixel Shader Version 5.0
Vertex Shader Version 5.0
Hardware T & L Yes
Vendor ID 10DE
Device ID 1184
Plug and Play ID VEN_10DE&DEV_1184&SUBSYS_36031458&REV_A1
Driver Version 9.18.13.4411
Memory 16 GB
Operating System Microsoft Windows 8.1 (build 9600), 64-bit
Service Pack 0
Size 64 Bit
Edition
Version 6.3.9600
Locale 0409
BIOS BIOS Date: 04/26/13 09:32:55 Ver: 04.06.05
Version American Megatrends Inc. V1.1
Manufacturer American Megatrends Inc.
Date 04/26/13
Display Maximum Resolution 2560 x 1600
Sound Device 1 NVIDIA High Definition Audio
Driver Version 1.3.32.1
Sound Device 2 NVIDIA Virtual Audio Device (Wave Extensible) (WDM)
Driver Version
Sound Device 3 Realtek High Definition Audio
Driver Version 6.0.1.6873
Sound Device 4 Screaming Bee Audio
Driver Version
DVD HL-DT-ST DVDRAM GH24NS95
CD HL-DT-ST DVDRAM GH24NS95
Drive 1
Size 931.5 GB
Free 606.7 GB
Drive 2
Size 228.4 GB
Free 41.5 GB
Browsers
Internet Explorer 11.0.9600.17107
Chrome 37.0.2062.124
Firefox
Safari 5.34.57.2
Software
Java 7.0.600
Flash 13.0.0.214
DirectX 11.0
.NET 3.5.30729.4926
QuickTime 7.75.80.95
Adobe PDF Reader 11.0.7.79

Looks like it might be broken for everyone who have TF2 installed and/or have TF2 content mounted.

It spams this a lot before a crash and begins to work if you delete TF2:

I love you.