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I started by installing a copy of Windows 7 that I had lying around. I installed that, installed Parallels Tools, and then I mounted the Tech Preview ISO from Windows 7 and double-clicked the Setup from the ISO. Windows Tech Preview installed and ran fine. Sounds like the "Other Windows" option above might be a bit quicker though, since you don't have to go through 2 installations.
Don't do it the hard way, select from the Parallels top menu, Install Parallels Tools, this will mount the ISO, if it doesn't start automatically, navigate in explorer to the Parallels Tools 'DVD' and doubleclick autorun.I have it installed, but I can't get Parallels tools to install. There is no action to in the menus and when I mount the ISO from the app bundle, it errors out at about 15% and wants me to reboot the VM. Over and over again. I don't have the VM configured at default specs, but have all of them bumped up a bit.
Don't do it the hard way, select from the Parallels top menu, Install Parallels Tools, this will mount the ISO, if it doesn't start automatically, navigate in explorer to the Parallels Tools 'DVD' and doubleclick autorun.
How to install Windows 10TP (32/64 bit) as a VM on Parallels Desktop (9/10)
1. Create a new VM and select the ISO.
2. Set it to Windows 8.1
3. Choose to customise the VM before starting the installation and change the HDD1 and the DVD from SATA to IDE (addresses 0:0 and 0:1, respectively).
4. When the installation is over, pick 'Install Parallels Tools' from the top menu of the VM.
5. Navigate to the 'Parallels Tools' DVD in Windows' File Explorer and double click on 'autorun'.

You are running PDM 8, my instructions clearly state versions 9 and 10.
I think the instructions are very clear, if changing SATA to IDE doesn't work (did you actually do that?), I cannot help.
As I said, I can't help you.Thanks for the quick reply. Yes I know your instructions was for PDM 9/10. But I thought you could help me with this problem with PDM 8. Also I did follow your instructions (changing the SATA etc..) Please help me if there is any way.
Excellent. Even more straightforward than my previous workaroundHow to install Windows 10TP (32/64 bit) as a VM on Parallels Desktop (9/10)
1. Create a new VM and select the ISO.
2. Set it to Windows 8.1
3. Choose to customise the VM before starting the installation and change the HDD1 and the DVD from SATA to IDE (addresses 0:0 and 0:1, respectively).
4. When the installation is over, pick 'Install Parallels Tools' from the top menu of the VM.
5. Navigate to the 'Parallels Tools' DVD in Windows' File Explorer and double click on 'autorun'.
this doesn't work for me and I can't install Parallels Tools on Win 10 Tech preview 32bit. It works fine on x64... but not 32bit. On 32 the Parallels Tools installation fails at around 20%... Anyone else able to install Parallels Tools on Tech Preview 32bit version?
ok, gonna try a new iso... the one that downloads from Parallels automatically is on 64bit.Yes, I am, my instruction have been tested on 32bit.
Hey guys,
Maybe I can help, the problem when installing Windows 10TP is just with the drivers for the SATA locations, there's no need to set 'Other Windows', you can set it to 'Windows 8.1' right from the start, then choose to customise before installing, change the DVD and HDD1 to IDE.
Note: Setting to 'Other Windows' works because one of the things it changes is SATA to IDE.