Hello and welcome to the forum. Sorry to hear that you're having trouble booting your Windows 10. Let's try some solutions step by step.
1) **Startup Repair:**
On the Windows Recovery CD, there should be an option for Startup Repair. Use this if you haven't done it already. After booting from the Recovery CD, select Troubleshoot > Advanced Options > Startup Repair.
2) **Use System Restore:**
Again, from the Windows Recovery CD, opt for Troubleshoot > Advanced Options > System Restore. This might undo recent changes that's causing your system not to boot.
3) **Using Bootrec.exe:**
Bootrec.exe is a utility that can fix some common issues with the Master Boot Record (MBR), Boot Sector and Boot Configuration Data (BCD). To use this command:
a) Boot from the recovery CD, open Command Prompt.
b) Type the following commands one by one hitting Enter after each:
- bootrec /fixmbr
- bootrec /fixboot
- bootrec /scanos
- bootrec /rebuildbcd
4) **Check BIOS settings:**
If above steps do not work, ensure that your boot settings in BIOS are set correctly. Make sure the Boot order is right and Hard Drive is recognized.
5) **Re-install Windows:**
If all else fails, a clean install of Windows 10 from the Recovery CD may be necessary (please back up all important data by connecting your hard drive to another computer before you attempt this, as this step will erase all data).
Remember, hardware faults, such as a failing hard disk, can also cause boot problems. If you suspect this might be the issue, you may need to consult an expert or contact Acer support to further diagnose the problem.
Hope this helps, and do let us know if you need further assistance.