BSOD related to PC sleep on new PC

New custom-built PC running Windows 7 Ultimate x64. Fully updated drivers, Windows update etc.

Everything seems to be fine, but I've had issues with BSODs occurring when the computer sleeps.

The computer goes to sleep, and when I go to awaken it, the computer reboots. One time it has shut down completely. Most times I'm only aware of the blue screen on rebooting when Windows tells me it had a bluescreen error. I've had a glimpse of a blue screen once, which occurred several seconds after resuming from sleep, but the computer promptly rebooted before I could get a good look at it.

The problem does not happen every time, it will sometimes have no problems entering and leaving sleep mode. I've looked through the Event Viewer to try and find a critical error but no real luck. I did note that sometimes the system appears to shut down well before I go to wake it up

I have attached the information from the SF Diagnostic Tool.

I would greatly appreciated any light someone can shed on my problem

Code:

fffff880`089e77c8  fffffa80`0f2102c0
fffff880`089e77d0  00000000`00000010
fffff880`089e77d8  fffff880`01997c19 NETIO!WfpActivateCaches+0x52
fffff880`089e77e0  fffffa80`074b75a0
fffff880`089e77e8  fffff880`01000003Unable to load image \SystemRoot\System32\Drivers\aswVmm.sys, Win32 error 0n2
*** WARNING: Unable to verify timestamp for aswVmm.sys
*** ERROR: Module load completed but symbols could not be loaded for aswVmm.sys
 aswVmm+0x3
fffff880`089e77f0  00000000`00000001
fffff880`089e77f8  00000000`00000010
fffff880`089e7800  00000000`00001560
fffff880`089e7808  fffffa80`074b75a0
fffff880`089e7810  00000000`00000000

Avast is flagged as the culprit. Uninstall it fully and replace with MSE.

Consider cleaning out your HOSTS file....no-one needs a HOSTS file with 15,000 entries! It wouldn't surprise me if this was causing network issues for you.

Attachment 342321