Computer keeps freezing

[sanrainer]

I've put this thread up here as I've heard that the people on this site are very helpful and I could really use some help for my pc which keeps crashing (updated as I am a complete fool and appear to not know how to use a thread) but my computer keeps freezing randomly during the day this had happened four to five times during the course of one day even when I was just using the internet browser and Skype it still froze and the only way I was capable of using my computer again was restarting the computer by the tower button because the mouse and keyboard stop responding and no sound comes out of my headset when it freezes

Here are the pc specs:
Microsoft Windows 8.1 64bit £76.99
1 x Creative Sound Blaster Z 5.1 PCI-E Sound Card £52.99
1 x 4 x Extra USB 2.0 Back Ports - PCI Card £9.99
1 x SD Memory Card Reader £9.99
1 x 300MBs Wireless PCI Card WiFi Network Adaptor £15.99
Zalman LQ315 Ultimate Liquid CPU Cooler £92.99
XFX AMD Radeon R9 290 4GB Graphics Card £314.99
£60 PC Build Charge, FREE UK Delivery, FREE Shockproof Packaging + FREE 1 Year Standard Warranty Package £59.99
XFX Pro Series 750W 80+ Bronze Semi Modular PSU £85.99
1 x 24x DVD-RW Optical Drive £19.99
Vibox Tactician Blue Gaming Case £49.99
1 x 2TB (2000GB) Sata III Hard Drive £67.99
16GB Corsair Vengeance 1866MHz Gaming RAM £139.99
Gigabyte GA-Z87X-D3H Motherboard £111.99
4.4GHz Intel Core i7 4770K 4-Core Haswell CPU *Overclocked* £

 

[abhisheksscorpion]

Check the temps on the CPU and GPU, before the restart. Also try DeClocking the Processor.

 

[Neur0nauT]

Check in Windows event viewer for any warnings or error messages.

Windows key + R
Type: eventvwr (enter)
Click on Windows logs > System

Use "Filter current log..." found on the right side
Check the boxes: "Critical, Warning & Error" >OK

This will show you all the recent warnings & errors on your system. You should check down this list to see if it refers to a particular piece of hardware, or component giving errors. Specifically check around the time of the last crash, to see what maybe caused it. Then you can work on fixing that.