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[Dursty]

can someone please tell me how to fix this problem ???Failed to load VMMR0.r0 (VERR_SVM_DISABLED).

[Ramshankar]

Please attach the VBox.log for the VM.

Also, please go to your system BIOS and make sure AMD-V is enabled. It might be called with terms like "Virtualization Technology" or "Virtualization Extensions" under CPU settings of your BIOS, depending on your BIOS.

[lgcm]

Same problem here.

My BIOS does not have the option mentioned.

Model: HP Compaq 6005 Pro SFF PC
Processor: AMD Phenom(tm) II X4 B95 Processor 3.00 GHz
Host: Windows 7 Professional
Guest: ubuntu-12.04.3-server-amd64

VBox.log:

VirtualBox VM 4.3.0 r89960 win.amd64 (Oct 15 2013 12:34:17) release log
00:00:00.407895 Log opened 2013-10-16T18:37:51.547664700Z
00:00:00.407896 Build Type: release
00:00:00.407899 OS Product: Windows 7
00:00:00.407900 OS Release: 6.1.7601
00:00:00.407901 OS Service Pack: 1
00:00:00.407910 Host RAM: 7679MB total, 5332MB available
00:00:00.407914 Executable: C:\Program Files\Oracle\VirtualBox\VirtualBox.exe
00:00:00.407915 Process ID: 6504
00:00:00.407915 Package type: WINDOWS_64BITS_GENERIC
00:00:00.412139 Installed Extension Packs:
00:00:00.412175 Oracle VM VirtualBox Extension Pack (Version: 4.3.0 r89960; VRDE Module: VBoxVRDP)
00:00:00.426198 SUP: Loading failed for VMMR0.r0 (C:\Program Files\Oracle\VirtualBox\VMMR0.r0) rc=VERR_SVM_DISABLED
00:00:00.426621 pdmR3LoadR0U: pszName="VMMR0.r0" rc=VERR_SVM_DISABLED szErr="SUPR3LoadModule: supLoadModule returned VERR_SVM_DISABLED"
00:00:00.426634 VMSetError: D:\tinderbox\win-4.3\src\VBox\VMM\VMMR3\VM.cpp(594) int __cdecl vmR3CreateU(struct UVM *,unsigned int,int (__cdecl *)(struct UVM *,struct VM *,void *),void *); rc=VERR_SVM_DISABLED
00:00:00.426639 VMSetError: Failed to load VMMR0.r0
00:00:00.426843 ERROR [COM]: aRC=E_FAIL (0x80004005) aIID={8ab7c520-2442-4b66-8d74-4ff1e195d2b6} aComponent={Console} aText={Failed to load VMMR0.r0 (VERR_SVM_DISABLED)}, preserve=false
00:00:00.468332 Power up failed (vrc=VERR_SVM_DISABLED, rc=E_FAIL (0X80004005))

Thanks

[Bender111]

Did you resolve the problem???

I have the same PC configuration and I have same problem.
I go back to version 4.2.18 and now all work!