Microsoft Hyper-V Virutal Machine Bus Provider problem
hello
have 2 node hyper-v cluster built on 2 windows 2012r2 hosts. yesterday after major long power failure (cluster went down due power loss) have tried bring up. on both hosts there problem microsoft hyper-v virutal machine bus provider in device manager - it'a marked yellow triangle status: 'the driver device not installed. (code 28). driver provider unknown, driver date , version not available.
this how before:
device root\vmbus\0000 configured.
driver name: wvmbusr.inf
class guid: {4d36e97d-e325-11ce-bfc1-08002be10318}
driver date: 06/21/2006
driver version: 6.3.9600.16384
driver provider: microsoft
driver section: vmbus_device_root.nt
driver rank: 0xff0000
matching device id: root\vmbus
outranked drivers:
device updated: true
and how looks now:
device root\vmbus\0000 configured.
driver name: null
class guid: {00000000-0000-0000-0000-000000000000}
driver date:
driver version:
driver provider:
driver section:
driver rank: 0x0
matching device id:
outranked drivers:
device updated: false
ive chcecked drivers location device on cluster , seems on failed cluster 3 files located in \windows\system32\drivers went missing: vmbkmclr.sys, vmbusr.sys , winhvr.sys. ive restored them device still not accesible.
how can fix problem?
hi j3drek79,
have tried right click on , update driver?
>>missing driviers device on both of hyper-v hosts causing problem starting virtual machines.
what problems?
- have you tried steps in the following kb?
best regards,
leo
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Windows Server > Hyper-V
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