There’s two types of strategies to take care of 0x8004026a Error code:
Advanced User Fix (manual):
1) Switch on your laptop or desktop and then log on as an
administrator.
2) Then click the Get started button then click All Programs,
Accessories, System, and then click System Restore.
3) From the next window, select “Restore my machine to a previous
date” then click Next.
4) Select the most recent restore point from the “click a restore
point” list, and then click on Next.
5) Click the Next button in the confirmation window.
6) Restart the system whenever the rescue is finished.
Beginner Resolution (totally automatic):
1) Download and open the (0x8004026a) fix tool.
2) Install program and then click Scan button.
3) Simply click the Fix Errors button once the diagnostic scan is
successfully done.
4) Restart the computer.
2You may wish to either edit your other answer, or delete that, rather than posting multiple answers. You'd also want to cite, and provide appropriate links. In general copy pasting answers is considered undesirable on super user as well, and looking at things, your answer looks like that. – Journeyman Geek – 2012-07-27T08:07:48.487
i try to correct myself from next post sir,thanks for valuable comments – BlueBerry - Vignesh4303 – 2012-07-27T08:10:05.660
1don't copy paste answers, write/summarize them with proper links & attribution – Sathyajith Bhat – 2012-07-27T08:19:53.777
+1 awessome answers. By the way vignesh you can add link on your second answer. – user4951 – 2012-07-27T09:55:48.727