Try this [url=http://lt.dell.com/lt/lt.aspx?CID=249387&LID=4743013&DGC=SM&DGSeg=CBG&RED=301&DURL=http://www.dell.com/support/troubleshooting/us/en/19/KCS/KcsArticles/ArticleView?
I want to write this guide because a lot of people are getting the C1100 off of Ebay or other sources and trying to update firmware but having trouble.
I have an Studio XPS desktop that won't boot into Windows, startup repair doesn't work, System Restore fails. I have run Dell diagnostics on the system and it's really strange. When i do the Pre-boot System Assessment the Hard Drive DST says Warning - Hard Drive - No Hard Drive Detected.
6/18/2013 (Latest Version)
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