You may find that svchost.exe holds a lock on a service whilst all the service libraries are being loaded. This in turn then prevents any other services in the same instance of svchost.exe from starting up until the call to the function has been returned.
An updated version of svchost.exe that will address the issue is available here http://support.microsoft.com/kb/2510636
When you run a Cable diagnostic using the Intel PROSet Network Adapter Diagnostics you may find that the utility incorrectly reports that your network cable is over 100 Metres and/or that the Cable is faulty/poor.
This issue can occur if you have a network switch that implements “power Saving” or “Green Ethernet” this feature is meant to reduce the power to a network port that is supporting a device with a short network cable run.
This “power saving” or “Green Ethernet” feature can cause the diagnostics to fail and can sometimes contribute to network drops and/or poor network throughput. If you have a managed/smart switch then you can normally login via a browser and “Disable” this feature to correct the issue.
You may suffer from a BSOD Stop Error Message with STOP: 0x0000007E and/or experience a Kernel Sockets Leak if you are running an older version of Ancillary Function Driver for Winsock or afd.sys
To prevent these two issues you need to be running the latest version of Afd.sys which can be downloaded from http://support.microsoft.com/kb/2579274
In this scenario if the Sender Policy Framework TXT record exceeds 512 bytes in size then you may find your server anti-spam fails to correctly identify e-mail as either legitimate mail or SPAM, this can result in the two extremes of SPAM mail being delivered to users or legitimate e-mail being rejected as SPAM.
Microsoft do offer a hotfix for DNS Server to prevent this issue KB 2495375 http://support.microsoft.com/kb/2495375