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16258
March 28th, 2016 02:00
No boot and no F12 boot menu any more after Boot Option Priorities is filled with >100 "Windows Boot Manager" items_Dell XPS 12 Win8.1
Hello everybody,
After restoration to Windows 8.1 (from Win10) I started to get an error "Windows failed to start... The Boot Configuration Data for your PC is missing or...". F12 opened a boot menu with the UEFI OS and many identical "Windows Boot Manager" options. UEFI OS selection resulted in normal Win 8.1 bootup.
However, after a last update, the system is unbootable. Moreover, with every reboot ~10 new "Windows Boot Manager" items appears in the Boot Option Properties list of the BIOS. Since a certain number (~80), F12 stopped working while booting.
Attempt to delete one of these items in "File Browser Del Boot Option" hangs BIOS.
Toggling Secure Boot does not help, Loading BIOS Defaults does neither resets the Boot Option list nor resolves the issue.
Adding a new boot item manually (e.g. USB) is not allowed (the message "Out of Max Count" appears).
Any suggestions?
The Laptop (SPS 12-9Q33, BIOS A06, i7-4510) is still on warranty.
xps_12
2 Posts
0
March 29th, 2016 02:00
Putting "UEFI OS" on the first place in the boot order does not help as at the next reboot new "Windows Boot Manager" (WBM) items shift it from top.
Update: Passed through Thorough ePSA Pre-Boot Assessment returns without errors.
What I need is to get to a Boot Menu, afterwords I will just load from the USB and will restore my EFI-Boot partition (seems it is corrupt).
I have contacted the Dell support, let's see what do they say.
Do you have any ideas?