Windows 8 freezes

I have just bought a Acer Aspire S3-391 Ultrabook™, Intel Core i3, 1.8GHz, 4GB RAM, 500GB Hard Drive - pre-installed 64-bit Windows 8.

I am experiencing regular freezes in Windows 8 - the cursor will freeze for no apparent reason. It happens even when the load on the system is extremely low - i.e. hover over a tile on the start screen.....I haven't even attempted to run video on the system yet.

Here's what I've tried to rectify the problem -- all haven't worked:

Refreshed the system
Attempted system restore - but restore failed
Opened up command prompt and ran "bcdedit /set disabledynamictick yes" - as I understand the problem could be to do with the Windows clock and processor dynamic ticking.
I've also changed the power management to high performance

I really don't know what else to try. I thought about wiping the machine and doing a fresh install of Windows but I don't have the installer as it came pre-loaded with the Acer S3.