My model Aspire V5 431
It came with win 8 preinstalled and was upgraded to win 8.1 and win 10 eventually and everything was fine. I am well familier with the acer e recovery system and backup recovery in USB. However I dont have the USB recovery backup anymore in my hand ( Why and how....thats another story
)
The problem started when I did a clean install of windows 10 via media creation tool by booting into that win 10 usb. The new win 10 installed and ran like a breeze. however I ran into activation problem and wanted to go back to my factory default win 8. To my horror I realized i dont have the USB recovery backup (yes you guessed right....I got too excited and used that same usb for media creation and i feel stupid.)
Anyway i thought it cant be that bad so I started the process of trying to recover without any backup in hand. following is the sequence of events:
1. The infamous Alt+F10 did not work
2. Went to bios by F2 and D2D recovery option is not there in the main menu
3. In the boot menu changed from UEFI to Legacy bios and the D2D is now visible in the main menu and enabled.
4. Rebooted and the Alt+F10 worked this time but came with a black screen with "os not found"
After that I went back to bios by f2 and changed back to uefi and booted normally to windows 10 without any issue. Installed partition wizard to check my partitions and this is what i found out

To me it looks like my partitions are intact. The only problem I can think of is that win 10 clean install somhow messed up the acer original MBR. Can anybody please help? The last thing I want to do is to order recovery dvd from acer for my 3 years old Laptop.