Posted 13 May 2010 - 10:38 AM
Ive just sat and ripped my hair out over this laptop, its a Toshiba Satellite, A300D. It installed Windows 7 Home Premium 64bit no probs, all good and i completed the installation. installed all my apps etc... and then it crashed with the C000021A error. Start up repair fixed the issue and said it was a currupted file. So i continued, and it crashed again, but this time startup repair didnt fix it. so i got the DVD out again and tryed to boot to that and then recieved the error C000021A, i then changed the ram slots, and changed the actual ram, and this did not fix the issue, so i took the hdd out and tried to boot to the cd without an Hdd, and the same result C000021A happened.
I found the Bios was version 1.80 and a update to 2.10 was released and that fixed the issue. Hope this saves someone else the trouble.
UPDATE YOUR BIOS!!!!
I did thru bartPE booting to xp. otherwise i would have had to reinstall vista (wich quite happily booted with no problems at all being a 32bit version) and then update the bios.
In the end the 1.80 Bios is not compatible with windows 7 64 bit and needs to be upgraded.
Hope this helps someone.