ConfigMgr 2007: Clients not installed - RegTask: Failed to get certificate. Error: 0x80004005

ConfigMgr 2007: Clients not installed - RegTask: Failed to get certificate. Error: 0x80004005

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We're starting to see a couple of these issues roll in so I thought a heads up might be in order.  This solution comes from Brian Shaw, one of our top gun support Engineers our in Charlotte, NC:


Issue: Some clients may not show as being installed when viewed through the System Center Configuration Manager 2007 admin console.  From the target computers themselves the agents appear to function properly. When viewing the ClientLocation.log file you may also see the following error:

RegTask: Failed to get certificate. Error: 0x80004005

Cause: This is caused by an issue with the RSA machine keys on the client.

Resolution: To resolve this issue complete the following steps:

  1. Backup all files in the C:\Documents and Settings\All Users\Application Data\Microsoft\Crypto\RSA\MachineKeys folder (or the corresponding folder on your specific clients).
  2. Restart the SMS Agent Host Service to recreate these certificates.
  3. At this point the clients should start showing up in the console.  If not, remove and push the client agent to the affected computers again.


I hope you don't get this issue yourself but if you do then at least know you'll know how to fix it.  Thanks Brian!


J.C. Hornbeck | Manageability Knowledge Engineer

  • I'm not sure I purchased the Reg Task but if I did, please cancel it at once.  I'm having health problems and moving into a nursing home soon.  Please refund my money if I purchased this plan as I won't be able to use it.  If it shows on the my credit statement, I'll have to have them cancel it.  

    Thank you,


  • Brilliant fix - I had a client with the same issue and deleting those RSA keys fixed the problem.

    Thanks again!


  • I think I must have downloaded two copies because I have two receipts for  4.95 and with in 10 days 35.00 will be billed < I also have one for 29.95 The one I thought I was getting was the 29.95 one so will you credit the other one back to my account. Thanks,



  • I am so sorry but I must cancel this product I can not afford it. Thank you for the trial run it is very good and help full

  • Worked great thanks. Not sure what started this error in the first place. Glad its fixed tho

  • i sorry but i must cancel the regstaf product in that it doesn't work good for me.  Please confirm that this has been done.  thanks

  • I want a refund.  Dont want.  My computer has not run right since I installed

  • I  want to cencel my request for this product. I am unable to  intsall because I am not that

    familar  with computers. Please cancel my order and refund my money.

  • I cannot install the program because I never got the Key.

  • regtask found almost 2000 errors in my PC and when I bought the product and received the key it didn't work! That key cost me 41 dolars and I can use it because of this problem. regtask wants me to spend another 40 d0llar in order to get another key.

  • It was a confusing process, seemingly  wanting me to buy additional processes.  i couldn't  use the key supposedly offered.  Please cancel my order.

  • I dont understand how to use and cannot afford the cost.  thank you.  PLs cancel

  • I'm glad to see that I am not the only one having problems. I bought the product, I have a receipt for the product, but it will not run. I asked for help yesterday and was told I would get help today. Today is nearly over. No help.Please cancel my order. And I would like a notification that it has been cancelled.

  • we would like our money back ,It doesn"t work computer has more errors than before.   Please let us know when repayed to our account thank you

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