Host CPU incompatible when booting 64bit Virtual Machine

Comments

1. Roger Zan says:

   14 September 2008 at 10:50 pm

   I figured out the solution. You have to go to the CPUID mask for the VM Advanced Options and change the 0×800000001 register edx to

   –1- —- —- —- —- —- —- —-

   By default it’s set to:

   —- —- —1 —- —- —- —- —-

   The dashes are 0 bits.

   Once you make this change, you should be able to start up the x64 VM without a problem. It’s stupid that this needs to be done, but until VMWare figures out a way to correct this, I guess this tweak will have to do.
2. Daniel Ruiz says:

   26 September 2008 at 3:02 pm

   You are the man… thanks for posting. I was tearing out my hair

   I had to change it from:
   —- —- —H —- —- —- —- —-

   to:
   –1- —- —- —- —- —- —- —-

   on ESX 3.5

   Daniel
3. sumeet says:

   2 May 2009 at 7:07 am

   Thanks for posting this.
4. Carter says:

   20 May 2009 at 12:56 am

   Thanks! This did the trick for me.
5. LodgeCat says:

   5 June 2009 at 12:42 am

   Sure glad you figured this out…Nice Work!
6. Andrew says:

   18 August 2009 at 7:31 pm

   Can someone help me I am new with ESX and I found as You posted 0×800000001 register edx

   and what should I do with that:

   RRTR HRRR RRRH RRRR RRRR XRRR RRRR RRRR

   What should i put in there?

   Thx for help
7. ilissan says:

   2 December 2009 at 7:21 pm

   Thanks! Great works like a charm!
8. Giuliano says:

   20 January 2010 at 11:58 pm

   Thanks a lot! it works, i’m very happy!!!!!!!!
9. Gary Singh says:

   2 October 2010 at 5:58 am

   It worked…perhaps the error message itself indicates the bits. so make sure when you set 1 as bit it should be replace 3 from the left. See the error my message very closely.

   BUT it is good solution to put. I guess VMware has fixed in ESX 4.1
10. Cordova says:

    30 October 2010 at 10:30 am

    Thanks! And yes the error message in 4.1 actually tells you what is required so if I had payed attention I would have saved a few hairs or two.
11. shah says:

    31 January 2011 at 3:32 am

    i am so thankful for that great work pls keep it up!!!!!
12. Jeevan says:

    19 March 2011 at 2:32 pm

    Thanks Daniel Ruiz and Roger Zan your trick helped me .
    i still have 1 issue . i am geting “starting windows” when i am install win2008 R2, after that screen VM igs shutting down.
13. Calvin says:

    10 May 2011 at 11:48 pm

    wow great post would have been in a lot of trouble otherwise.
    using esx3.5u1 here.
    In response to Andrew’s post (i’m sure he found the answer anyway), i used:
    RR1R RRRR RRRR RRRR RRRR XRRR RRRR RRRR

    just note that it seems to be common practice to restart vcenter services after changing these settings. worked for me.