Hello,
I have not tested upgrading to Windows 8.1 on VMware,
but, as I know, till now the only problem is connected with Intel HD Graphics VGA driver on Windows 8.1.
To find out solution for it , see here:
http://www.satinderspace.com/2013/10/steps-to-remove-windows-81-blank-screen.html
Hope helped you.
Yours, Oscar
I have upgraded one VM from 8.0 to 8.1, I am running WS 9.02. You do it the same way as a physical machine, via the MSFT store.
I encountered 3 problems:
1. First try, the option to upgrade did not show up in the store.
I did a windows update, went back to the MS store and ran the upgrade.... wait, wait, yawn, wait some more. 
2. When starting the VM, I got the promiscuous mode error, I am running on a Linux host. Provided the proper permissions to get rid of that error each time the VM starts.
3. That error seemed to have to do with enabling shared folders. I cannot see the hosts shared folders even after fixing #2. They were there with 8.0.
Since I don't use shared folders (I use the Samba server in my Linux host), I have not pursued it.
I run Visual Studio (now 2013 Pro) in that VM and it is working OK. I don't do much else. I don't see any video problems, I have tested Unity: OK, full screen: OK. Dual screen ever so slightly flaky but OK.
Lou
>>I assume your configuration is not supported?
VMWare has a page where you can look up what is supported. I had been running 8.0 in a VM and decided to test the upgrade. I also need it to write WP8 store apps. If it is unsupported, it means VMWare won't help you try to fix it.... you get more help here anyway.
I won't bother with version 10 until they release a couple of more fixpacks. The suits always seem to demand release prior to completion.
Lou
Haha, of course the suits demand premature release because their biggest fear is that the technicians waste time and money adding unnecessary code. Better too early than too late, eh. But let's be fair. I'm using VMware products for nearly 10 years now and I can not complain.
Anyway, I agree with you that it's a good idea to let version 10 "settle" for some time. I've downloaded 10.0.1 and will use it for some time before doing my guest upgrade from Windows 8 to 8.1.
louyo wrote:
>>I assume your configuration is not supported?
VMWare has a page where you can look up what is supported. I had been running 8.0 in a VM and decided to test the upgrade. I also need it to write WP8 store apps. If it is unsupported, it means VMWare won't help you try to fix it.... you get more help here anyway.
I won't bother with version 10 until they release a couple of more fixpacks. The suits always seem to demand release prior to completion.
Lou
Thank you for your reply, newbie93. What do you mean by "it's in the selection of OS's for the VM." When you use the New Virtual Machine wizard, you can select Windows 8.1 as guest operating system? I don't see this.
I really don't know if I should be happy or angry about you people telling me that I have just wasted some money upgrading to WS 10 for Windows 8.1 support. 
I don't see any user-visible changes to WS 10 that are specific to Windows 8.1. Maybe they have changed something under the hood, but I can't find any information about it.
I'll start the upgrade of my guest to Windows 8.1 now. Wish me luck...
newbie93 wrote:
You can add me to the list of users running Win 8.1 (x64) guest (on win 7x64 SP1 host) in workstation 9.0.3. Seems to be running just fine. Using shared folders and running test builds inside of it. I didn't do an upgrade though, installed from scratch.
I also was surprised, but it's in the selection of OS's for the VM. I have a copy of Workstation 10 because I also thought I needed it and was ready to upgrade if needed, but 10 still seems to have a lot of problems still and if I can run using 9.0.3, I will until 10 becomes useable. 9.0.3 seems to be pretty solid for me so far even some of my unity problems when undocking / redocking a laptop using 3 monitors seem to be much less so far. USB performance still sucks compared to using v10, but I vote for reliability/stability over bells/whistles/performance.
