I got a message to say that it was setting itself up for my environment (or something like that). I collected together a load of utilites and put them on a USB stick.Īfter booting up with my recovery USB stick I then ran ONLY FRST64.exe from the USB stick. Here's what I've done so far based on what I've read on the forum. I've read through some of the other posts here and gone as far as I can but your notes here suggest that I shouldn't run "fixing" type tools without realising what I'm doing - hence the need for the post here. ![]() I then took the Win7 drive out and put the Win10 one back - still the same error and machine would not boot - error C000021a.Īny help you can give would be much appreciated. I think that should rule out the hardware (all except the actual Win10 HDD of course). The machine came up and worked perfectly. To rule out the hardware, I installed my previous (working) Windows 7 boot disk and booted the machine with that. NVidia GEForce Graphics card (not sure which one but I could take it out if you really need to know which one!)ġ * WD Blue 1GB disk, 1 * Samsung 1GB disk. It took me months to get them all "just so" so I really want to get this machine back if I can without going through all the pain of another install! I've not updated anything recently that I can recall (at least just before the crash) so it is a little odd. I have a load of music composition programs on this particular machine and whilst I can indeed install the OS and these programs again, I have them all set up just as I want them. None of these yield any results so it's looking like something serious - possible malware infection. I've tried the usual, Startup Repair, Normal Startup, Safe mode (won't work) and Last Known Good Configuration. However, over the last 3 months I've also experienced a couple of WHEA errors too but rebooting solved those. I was using it one evening (all was ok) then when I turned it on the next morning I was unable to boot and got the C000021a error. I have a nasty predicament where I cannot boot my Win 10 Pro on my desktop machine.
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