You have to use the computer management console under administrative tools to assign drive letters. Here's a more detailed link,
Change, add, or remove a drive letter - Windows Help
UBCD that I am familiar with is an ISO file, you burn it to cd and then boot from the CD... not sure what you are referring to "UBCD startup files ". You can put it on usb but you need a tool to create a bootable flash drive.
I got lots of vintage computers, DOS 6.22/Win3.11, OS2, WIN98
Thanks... I did the compmgmnt.msc thing, and now I can see the drive. Since I had accidentally formatted the 2T drive, I lost all the files, but my son has a complete backup so no loss except time.
So I did load the current UBCD (DVD from the ISOa0. It loads ubuntu files, and PartMagic,
Did this on both bricked computers, so have the linux tools. Using the file manager, on one of the computers I can see all of the windows files, but don't know what to do with them.
On the other computer, the file manager doesn't see anything but the hard drive... no files.
I also have an old Acer laptop on which I have a dual boot... Windows XP and Kubuntu.
Am afraid I don't have the patience to learn linux
in fact not that much time left for anything....
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What really puzzles me, is that Microsoft doesn't offer any help that I can see... the Page that came up when I lost everything said that "C:file/BCD cannot be found. Contact your administrator, or the manufacturer of your computer. "
In looking for help on Google, there are literally dozens of the better known websites... CNet, Lifehacker etc, that offer forums for the different install errors. The first post asks the question, and the answers flow fast and furiously but for all of that, almost no satisfactory answers. Nowhere did I find a program that promised a "fix".
All in all, I'm only out a few hundred dollars and my time which is exceedingly cheap. I can't believe I'm the only one to lose a computer to Windows 10, and I'm guessing that most people who have the problem, have a lot more invested.
I expect that at some future date, faced with crowd sourced complaints, that Microsoft will offer some kind of free file for installation on those computers that have an original 25 digit register code. Personally I'd prefer a few thousand dollars for "pain and suffering".
I am not into hacker tactics, but after this, I might be tempted to consider some retribution. Looking back, I made a mistake by not backing up my system, but looking back a little further... wonder why all computers don't come with a backup disk? How much did the manufacturers or Microsoft save by eliminating this safety factor? Planned obsolescence?
Anyway... up and running with Winows 7 on one computer, and Windows XP on three others. After i get bored with playing, I'll go back to Walmart on-line for another Windows 7 refurb computer for under $150... The last one was 4gig of RAM and a 1T drive for $109. maybe it's still available.