Another blue screen

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 2057

Additional information about the problem:
BCCode: 51
BCP1: 0000000000000001
BCP2: FFFFF8A000024010
BCP3: 0000000000E9F000
BCP4: 0000000000000374
OS Version: 6_1_7600
Service Pack: 0_0
Product: 256_1

Files that help describe the problem:
C:\Windows\Minidump\010909-25843-01.dmp
C:\Windows\Temp\WER-27593-0.sysdata.xml

My system :

CPU : E8400 @ 3.0 Ghz
4 Gigs of RAM
ATI 4580
mobo : AsRock : p45xe

Nearly all say 0x51 registry error
Have you edited the registry or used a reg cleaner recently

Could try system restore to a past good configuration
Run chkdsk & HD diagnostic tool to check HDDs for errors

Let us know how it goes

That's a whole pile of errors from the 27th alone!!!

Try this stuff:

H/W Diagnostics:
Please start by running these hardware diagnostics:
Memory Diagnostics (read the details at the link)
HD Diagnostic (read the details at the link)

Also, please run one of these free, independent online malware scans to ensure that your current protection hasn't been compromised: Malware (read the details at the link)

More info on the reasons behind this error here: BSOD Index

Not much info in the memory dump to figure this out.
These 2 older drivers will need to be updated. Don't use Windows Update or the Update drivers function in Device Manager. Visit the support website of the device/program manufacturer to get the latest version:

hamachi.sys Wed Aug 15 19:05:08 2007
RTKVHD64.sys Thu Oct 30 23:44:10 2008