Windows guest Hangs on 10.10.1 host

[Rakka]

ever since i have upgraded from mavericks to 10.10 (MBP - EARLY 2014) my host running Win8.1 hangs on startup and then in-between also.
currently i am using VB-4.3.20 with the update guest.
when ever i start my Guest it lets me login and when the startup screen comes for win 8.1 it hangs .
some times if i disconnect from company network and use Public WIFI it doesnt hangs ,but some times it does . the same behavior occurs if i don't chose non in the network. so ever time it hangs i need to try different combination to make it run

i have tried using a new ISO but the same issue ,the guest hangs .

is this a issue with 10.10 only as on 10.9 it works fine or something that needs to be done at Virtual box .

[socratis]

Please read the following: Minimum information needed for assistance. If possible, attach two logs; 1) you start and shutdown your guest and no hanging occurs and 2) one that your guest hangs. Zip them first please.

[Rakka]

attached are the 3 sets of logs (each contaiins 4 log files).
let me know if oyu require any more infomration.

it is a 64 BIT MACHINE

ARCHIVE LOGS are also when teh machine is hang

[loukingjr]

one problem is you have 8 cores assigned to the guest when your host only has 4. Reduce the cores to 2.

[Rakka]

tried reducing the core to 2 but didn't work .
i have another mac running i7 10.9 and running 8.1 VM with 8 core but it has no issues .
May be the issue is not related to it .

but your help is appreciated

[loukingjr]

You're welcome although I have no idea how you can run 8 cores on a guest and not have problems. I have several Macs with 4 core i7s. They have 4 physical cores and 8 threads. If I assigned all the cores to a guest I don't know what my hosts would use.

[socratis]

If I assigned all the cores to a guest I don't know what my hosts would use.

Aether?

[loukingjr]

If I assigned all the cores to a guest I don't know what my hosts would use.

Aether?

Dark Matter.

[Rakka]

one problem is you have 8 cores assigned to the guest when your host only has 4. Reduce the cores to 2.

Apologies loukingjr !!

my bad i mucked up between memory and the processor , now it is working fine for last 2 day .

thanks once again

[loukingjr]

no need for an apology. glad it's working.

[newbsftw]

Hello,

I just wanted to say I had a similar issue with rMBP 13 (Mid 2014) and Windows 7 64 bits as Guest, a short time after booting Windows would hang.

After much fiddling, tried disabling the network and it didn't hang anymore.

Then I changed the network settings from NAT to Bridged Adapter, re-enabled the network and it doesn't hang anymore.

Just my .02€ if anyone encounters the same issue. The Windows partition is a raw-vmdk from Bootcamp.