Cannot upgrade Windows Vista to Windows 7 error 0xc000021a.

Please if any body knows tell me? icannot do something on the computer it's jut turn

OT:i has been upgraded to Windows vista to windows7 and error oxc000021a como computer start and stop will not is the case of 4 hours is any body can tell me what to do

Hi Gurdhianheera,

I suggest you to run the Startup Repair tool:

Startup Repair: frequently asked questions
http://Windows.Microsoft.com/is-is/Windows-Vista/startup-repair-frequently-asked-questions

See also: Windows 7 installation problems: frequently asked questions
http://Windows.Microsoft.com/is-is/Windows7/Windows-7-installation-problems-frequently-asked-questions

Hope this information is helpful and let us know if you need more assistance. We will be happy to help.

Tags: Windows

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