Crackling and Static on Pro Tools 11

Hey guys,

I've been running Pro Tools 11 for a while now in order to record drum tracks in my home studio. I've been relatively problem free until recently. Now, when I play back tracks, I get static and crackling which often delays my file mid-playback. It seems to be in random spots, and the amount of tracks doesn't seem to have an effect on the static- it happens with big files or very small files. My interface is a Tascam 1800, set to the highest latency. Sandra report below. I really appreciate any help!

-Josh

SANDRA REPORT

ID
Host Name : Josh
Workgroup : WORKGROUP

Computer
Model : ASUS S500CA
Serial Number : D1N0AS2********
Chassis : ASUS Notebook
Mainboard : ASUS S500CA
Serial Number : BSN1234567**********
BIOS : AMI (OEM) S500CA.204 02/05/2013
Intel vPro : 8.01.02.1318
Total Memory : 3.89GB DDR3 SO-DIMM

Processors
Processor : Intel(R) Core(TM) i7-3517U CPU @ 1.90GHz (2C 4T 2.8GHz/3GHz, 2.8GHz IMC, 2x 256kB L2, 4MB L3)
Socket/Slot : FC PGA988

Chipset
Memory Controller : ASUS Core (Ivy Bridge) Mobile DRAM Controller 100MHz, 4GB DDR3 SO-DIMM 1.6GHz 64-bit, Integrated Graphics

Memory Module(s)
Memory Module : LG [Empty] 4GB DDR3 SO-DIMM PC3-12800U DDR3-1600

Video System
Monitor/Panel : AU Optronics Generic PnP Monitor (1600x1200, B156XW04 V5
, 15.3")
Monitor/Panel : FNI LCD TV
(1600x1200)
Video Adapter : Intel(R) HD Graphics 4000 (16CU 128SP SM5.0 350MHz/1.15GHz, 32MB DDR3 1.6GHz 64-bit, Integrated Graphics)
Video Adapter : Intel(R) HD Graphics 4000 (16CU 128SP SM5.0 350MHz/1.15GHz, 32MB DDR3 1.6GHz 64-bit, Integrated Graphics)

Graphics Processor
OpenCL GP Processor : Intel(R) HD Graphics 4000 (128SP 16C 350MHz/1.15GHz, 1.8GB DDR3 1.6GHz 64-bit, Integrated Graphics)
Compute Shader Processor : Intel(R) HD Graphics 4000 (128SP 16C 350MHz/1.15GHz, 64MB DDR3 1.6GHz 64-bit, Integrated Graphics)

Storage Devices
Hitachi HTS545050A7E380 (500.1GB, SATA300, 2.5", 5400rpm, 8MB Cache) : 466GB (C:)
SanDisk SSD U100 24GB (24GB, SATA600, 1.8", SSD) : 22GB
WDC WD10JMVW-11AJGS3 (1TB, USB2/SATA300, 5400rpm, 8MB Cache) : 931GB (D:)

Logical Storage Devices
Windows (C:) : 444GB (NTFS) @ Hitachi HTS545050A7E380 (500.1GB, SATA300, 2.5", 5400rpm, 8MB Cache)
My Passport (D:) : 931GB (NTFS) @ WDC WD10JMVW-11AJGS3 (1TB, USB2/SATA300, 5400rpm, 8MB Cache)
Recovery : 900MB (NTFS)
Hard Disk : 350MB (NTFS)
Restore : 20GB (NTFS)

Peripherals
LPC Hub Controller 1 : ASUS Panther Point LPC Controller
Audio Device : ASUS Panther Point High Definition Audio Controller
Audio Codec : VIA 8446
Disk Controller : ASUS Panther Point Mobile 6 port SATA AHCI Controller
USB Controller 1 : ASUS Panther Point USB xHCI Host Controller
USB Controller 2 : ASUS Panther Point USB Enhanced Host Controller #2
USB Controller 3 : ASUS Panther Point USB Enhanced Host Controller #1
SMBus/i2c Controller 1 : Intel ICH SMBus

Printers and Faxes
Printer : Send to Microsoft OneNote 15 Driver (1200x1200, Colour)
Printer : Microsoft XPS Document Writer v4 (600x600, Colour)
Printer : HP Officejet Pro 8610 (600x600, Colour)
Printer : HP Photosmart C309a series Class Driver (600x600, Colour)
Printer : HP Photosmart C309a series Class Driver (1200x1200, Colour)
Printer : HP Photosmart 5510d series Class Driver (600x600, Colour)
Fax : Microsoft Shared Fax Driver (200x200)
Printer : Adobe PDF Converter (4000x4000, Colour)

Peripherals
Media Player : WD My Passport 0830 (931.48GB)

Network Services
Network Adapter : Qualcomm Atheros AR8161 PCI-E Gigabit Ethernet Controller (NDIS 6.30) (Ethernet)
Network Adapter : Bluetooth Device (Personal Area Network) (Ethernet)
Wireless Adapter : Qualcomm Atheros AR9485WB-EG Wireless Network Adapter (802.11n (HT), 72.2Mbps)

Power Management
Battery No 1 : ASUSTek X502--40 45.34Wh/4.03Ah

Operating System
Windows System : Microsoft Windows 8.1 Home 6.03.9600
Platform Compliance : x64

Windows Experience Index
Current System : 4.7