


What should I do if my win7 computer has a blue screen c000021a?
1. The solution to the first reason is to first enter the BIOS interface of the computer, find the "Into grated peripherals" option, and then just change the value of the "SATA Configuration" item to IDE.
2. The solution to the second reason is to try to start Windows in safe mode. Press the F8 key when booting and select "Safe Mode"
3. Disable redundant startup items in safe mode, then enter "msconfig" in the "Run" dialog box, and switch to "Start" to cancel other redundant startup items.
4. Select to enter the safe mode of the computer and delete the installed system or restore it to before the update.
5. The solution to the third possible cause is to replace the hard drive, because the blue screen may be due to a problem with the hard drive.
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