Is there a way to keep win 8.1 on 1 partition, upgrade 8.1 to win 10 on another so it can be set up as a dual boot? If so, how plz? thx
Win7 Pro & Win10 Pro dual boot I'm trying to do the same thing but with Win7 Pro. I get as far as upgrading to Win10 but consistently get a "Safe os boot error" on the 1st reboot! It's so maddening. My poor hard drive is probably tired of being nuked by DBaN. Maybe my procedure can help u. First I install Win7 x64, activate with Daz Loader then create another partition. With 300gb, I pretty much divide it in half & the system reserves 300mb. I check that Win7 is activated & genuine in computer properties & by command prompt (it always shows as genuine & permanently activated, except I can't get it to validate online). Next I shut down & restart my computer (it's set to boot the disk drives first) and do another Win7 Pro install but with x86 on my unallocated partition and repeat everything from the first install. Win10 x64 wouldn't run on this computer so I use Win7 x86 for the upgrade. I've tried upgrading online using the MCT "upgrade this computer now" and by the Win10 Pro x86 DVD iso I created using my other computer. Everything is fine until the first reboot, then it hangs with only the Windows logo on a black screen, EVERY SINGLE TIME When I hard shut down & restart I get a msg that "Win10 couldn't be installed due to a Safe os ...... boot error". You may not have this problem though. Hope this helps.
I am Triple booting on my Test Machine. 1. Windows 10 Enterprise -is own HDD not a partition - Disk 0 2. Windows 10 Enterprise LTSB - its own HDD not a partition - Disk 1 3. Windows 8.1 Pro - its own HDD not a partition - Disk 2 I do this so that none of them ever get DeActivated. and I can "s**t Can" any one that I want at Any Time...
So how do you do yours, i have many older ATA HDDs and easy to slip in or out unplug and use as i see fit. I also have issues with any of them seeing ea other, and ea is its OWN MASTER Boot Record. A question was ask and I gave a honest answer... and you know that many people are having issues if done on/in the same HDD different partitions that one will De-Activate the other.. Different HDDs are the answer. and never any issue... then If he wants he can use EASYBCD then add all HDDs to the order an chose any one to boot to. to me this seems the best way to go...
That was actually a joke, having boots on my feet, hands. Had nothing to do with your setup, thought it would make you laugh. But having a setup with a drive for each is the best. Could you Tri boot with a GPT UEFI setup ? Do you have a thread with how to setup ? if not why don't you make one, maybe with two windows and a Linux, I bet it would be a hit. I'd love to see it.
All my systems are UEFI and GPT 1. Acer has 2 2. Gigabyte has 3 3. Dell Laptop has 2 4. If i open the Acer 23" AIO - replace the SSD with 7200 rpm 1.5Tb split that HDD into partitions, then yes, I tested Master UEFI GPT is Windows 8.1 OEM, added Windows 8.1 Enterprise(MAK), then tested added Windows 10 Enterprise(GVLK), and last one was Windows 10 Enterprise LTSB-OEM all of them say Activated. and I used EASYBCD to add ea one. to the list... as long as you keep the Original Sequence for 8.1 OEM, I have had NO ISSUES... but it does get confusing due to the way EASYBCD sees what MS adds, so when I A. make a clean partition - dism /apply-image 2a. add with EasyBCD - rename to Win10Ent B. same as A 2b. add with EasyBCD - rename Wind10LTSB This way I have 3 OSs to chose from and just be careful that you do not DEFRAG the OS unless you are Booted into.... and When I test the 1TB SSD, DO NOT TRIM unless your in that OS... so make sure you DONOT LET MS Schedule... I removed the SSD to use the 7200 for TEST ... real PITA the 23"AIO only allows 1 HDD
Thanks Snuffy, your post above threw me, as it looked like you had 10, then installed LT, then 8. Back in the day's of vista an 7, I used Easy, can't remember now, but something happened and lost the boot menu and even with easy I couldn't figure out for the life of me how to get it back, so a few times I had to reinstall both. After that I didn't dual anymore.
No, sorry the 1st installed Master is Window 8.1 on Acer the addon is Enterprise LTSB. and I have continused to use EASYBCD since Im still a Beta Tester... and it works with UEFI fine eventho it popup says issued.
I have dual boot win7/win10. The issue is restore point in win10, every time I boot in win7,restore point gone in win10. Win7 is OK.
I'm going to try all these suggestions but the problem I keep running into no matter which way I attempt to upgrade is that Win7 isn't validating online and I keep getting the safe boot error. I just tried upgrading normally (1 partition, 1 os), got hung on the black screen with a frozen logo on 1st boot Rebooting shows the typical "Windows 10 couldn't install, error 0xC1900101-0x20017, failed in SAFE_OS phase with an error during BOOT operation". When trying to validate Win7 online I get "Microsoft cannot determine if this copy of Windows is genuine, try again later". My attempts are from Win7 pro to Win10 pro on a friends old HP Media Center PC using daz loader 2.2.2. I've tried to upgrade in both x86 & x64 environments. I'm about ready to throw in the towel on Win10 for this computer.