I downloaded something called Speccy to have a look at specifications and a bit of info and noticed that it indicates a motherboard system temperature of 123 °C. I'm not into stuff like this but that looked high. The CPU's is on 39 and 41 °C. Could this be the issue?
Summary like this:
Operating System
Windows 8.1 Pro N 64-bit
CPU
Intel Core i5 4250U @ 1.30GHz 40 °C
Haswell ULT 22nm Technology
RAM
16,0GB Dual-Channel DDR3 @ 798MHz (11-11-11-28)
Motherboard
Intel Corporation D54250WYK (CPU 1) 123 °C
Graphics
SMS27A350H (1920x1080@60Hz)
SONY TV (1920x1080@60Hz)
Intel HD Graphics 5000 (Intel)
Storage
111GB Samsung SSD 840 EVO 120GB mSATA (SSD) 34 °C
1863GB Hitachi HDS722020ALA330 USB Device (USB (SATA)) 47 °C
Optical Drives
No optical disk drives detected
Audio
USB Audio Device
CPU
Intel Core i5 4250U
Cores 2
Threads 4
Name Intel Core i5 4250U
Code Name Haswell ULT
Package Socket 1168 BGA
Technology 22nm
Specification Intel Core i5-4250U CPU @ 1.30GHz
Family 6
Extended Family 6
Model 5
Extended Model 45
Stepping 1
Revision C0
Instructions MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, Intel 64, NX, VMX, AES, AVX, AVX2, FMA3
Virtualization Supported, Enabled
Hyperthreading Supported, Enabled
Fan Speed 3237 RPM
Bus Speed 99,8 MHz
Stock Core Speed 1300 MHz
Stock Bus Speed 100 MHz
Average Temperature 40 °C
Caches
L1 Data Cache Size 2 x 32 KBytes
L1 Instructions Cache Size 2 x 32 KBytes
L2 Unified Cache Size 2 x 256 KBytes
L3 Unified Cache Size 3072 KBytes
Cores
Core 0
Core Speed 798,4 MHz
Multiplier x 8,0
Bus Speed 99,8 MHz
Temperature 41 °C
Threads APIC ID: 0, 1
Core 1
Core Speed 798,4 MHz
Multiplier x 8,0
Bus Speed 99,8 MHz
Temperature 39 °C
Threads APIC ID: 2, 3