None of the solutions from similar posts are working. OK Microsoft: When a problem like this crops up on dozens of unrelated machines, I eventually suspect virus activity. Multiple PC's can suddenly no longer start any of the services that will allow them to connect to a network, AND the diagnostic Policy Services also can't load to be able to determine the cause of the problem? Now add the fact that the Windows Firewall has been disabled, along with the event viewer so that you can't even look at a report to tell you what's going on? If you don't recognize that as virus actrivity, you need to be in another line of work! OK, so everyone is able to install malwarebytes from a flash dive and destroy the virus. Now, considering we can't get network connectivity, can't you write a macro that turns on all the required services that allow networking to work? If that doesn't resolve the issue, I'm sure it will at least generate a more specific error code, now that most of the reqiuired services have been restarted. DHCP Client, Diagnostic Policy Services, and several other services return an access denied; error 5 when trying to start them. This stems from not being able to get an IP address and make a network connection. Can you guys get on top of this one real quick???

Hi, Thanks for posting in Microsoft TechNet forums. I am sorry for what you have gone through. Usually, it is not suggested to open any email or downloaded file from unknown resource. Always keep your firewall on, update your antivirus software’s definitions and perform full system scan frequently. Only in this way can help prevent virus infection to the most. If you could not get online in any way, you can try downloading the antivirus software from another working operating system and use a flash drive to transfer it to the problematic one. Meanwhile, please understand that we are striving to capture any and all product issues and product feedback so as to ensure that we are continuously developing Microsoft products to meet our customers' needs. Since Windows 7 is still a new product, I believe it will become more secure based on users' feedbacks. This is exactly why feedback such as yours is always valued. Best Regards Magon Liu TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.comPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Magon: Did you really read the details of what I described above? Based upon your "rubber-stamp" response, I'm thinking NOT. What I'm looking for here (along with hundreds of other users on several forums) is a solution to a problem with very specific issues that has been well defined by reasonably tech-saavy people. I'm sure if we've been able to supply such detail in describing the problem, that there is someone available within Technet (preferrably from MS) who can say, "Ah; network-related services have all beem disabled by a malicious virus. I know how to resolve that." I'm thinking that any top-flight MCSE should be able to figure that one out since they would know all the services that are required to start the DHCP Client and Diagnostic Policy Service, as well as the Windows Firewall and Event Viewer. So, can one of you MCSE's please respond to this problem and I will volunteer to post the solution to all the other fVista Forums so that evryone that I've encountered to date can benefit from your support? Thanx (in advance).

Hi, Thank you for your reply. access denied; error 5 indicates incorrect permissions. If we need to recover the service manually, it is suggested to manually grant the user SERVICE with full permissions to the registry keys. As I can't name all the corresponding services, we can right click on the parent registry key HKLM\SYSTEM\CurrentControlSet\services, permissions... full control. The following thread has more details: http://social.technet.microsoft.com/Forums/en-US/itprovistadeployment/thread/23351e06-dcbd-40ff-95da-368d0af5868c Please note what Taz0 wrote. Hope it helps.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

This KB article resolved the problem for me, running Windows7 Enterprise, even though it says this is a solution for Vista. http://support.microsoft.com/kb/943996 I would sure like to know how these permissions changed in the first place. It's not like I was in the registry randomly removing permissions for the NT service\MpsSvc account. Clearly, this problem has been around for awhile if the solution dates back to Vista.

I tried to modify the permissions on the registry key HKLM\SYSTEM\CurrentControlSet\services, permissions = full control; inheritable bysub-folder keys. This may have worked for all of you, but it failed to resolve the issue for me.The "access denied - error 5 is still occuring. Does anyone have any other ideas before I reimage this PC?