Question about Compaq Presario CQ60-220US PC Laptop
Without getting into some very advanced and lengthy processes, there is one possible easy repair.
1. With the laptop powered off, press the power button and immediately and repeately hit the F8 key until a black screen with white letter selections appears.
2. Using the up-down arrow keys, select "Last Known Good Configuration" and hit enter.
This may solve the error. If it doesn't, there are difficult and lenghty processes to work through, many described in tech blogs that can be found by merely Googling "C000021A"
Best of Luck,
Posted on Apr 05, 2011
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Posted on Jan 02, 2017
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