Dell Inspiron shuts down completely in sleep mode

[beachmama46]

For the past couple of weeks, my PC (desktop) has been shutting down in sleep mode. I get this message when booting back up in the morning:
Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: a
BCP1: FFFFF8A0001E4648
BCP2: 0000000000000002
BCP3: 0000000000000000
BCP4: FFFFF80002C7825B
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

I have attached here a copy of the DM Log Collector file. I'm not incredibly savvy at hardware issues, although I'm decent enough at software. I'm not sure if more information is required or if you can tell from the attached what may be causing the problem, but any advice is appreciated. My PC is about 4 years old, running Windows 7 Home Premium edition.

 

[Tobias]

1, Probably caused by the ATI Radeon HD 3200 Graphics driver, update it:
fffff880`04839000 fffff880`04e4f000 atikmdag Mon Jun 15 04:41:39 2009 (4A35B4E3)

2, These drivers also needs updating:

Cisco Systems VPN Client
fffff880`04328000 fffff880`04354000 dne64x Tue Nov 11 02:01:24 2008 (4918D964)
fffff880`086a3000 fffff880`08730000 CVPNDRVA Tue Mar 23 20:16:37 2010 (4BA91395)

Sonic CD/DVD driver (Roxio)
fffff880`01334000 fffff880`0133fe00 PxHlpa64 Wed Jun 24 01:16:35 2009 (4A416253)

VIA High Definition Audio
fffff880`05e13000 fffff880`05fa9000 viahduaa Fri Jul 24 14:23:37 2009 (4A69A7C9)

Realtek PCIe FE Family Controller
fffff880`04219000 fffff880`0429e000 Rt64win7 Fri Jun 10 08:33:15 2011(4DF1BAAB)

CD-ROM Class Filter Driver (iTunes)
fffff880`0429e000 fffff880`042a4c00 GEARAspiWDM Thu May 03 21:56:17 2012 (4FA2E2E1)

3, update your BIOS:

BiosMajorRelease = 8
BiosMinorRelease = 15
BiosVendor = Dell Inc.
BiosVersion = A10
BiosReleaseDate = 11/12/2009
SystemManufacturer = Dell Inc.
SystemProductName = Inspiron 546
SystemFamily =
SystemSKU =
BaseBoardManufacturer = Dell Inc.
BaseBoardProduct = 0F896N
BaseBoardVersion = A03

4, I also recommend that you replace Norton with Microsoft Security Essentials.