OK I'm not an IT guy but hear me out here is what happened:
I have a great latitude e6420 that my company generously gave me when I retired in April of 2014
Warranty expired April of 2015.
Bios A01 (super early?)
June 2015 hard drive failed, kaput, finished...so I purchase a Crucial M500 SSD for the main drive
I am unable to install newly purchased Win 7 64 for new systems OS - gets to final last stage and I get the blue screen of death. "HIDCLASS.SYS" is called out...
I look up the error codes and it says its an usb problem remove any wireless KB or mouse useage. and reset Bios to defaults.
Now CD/DC\VD has disappeared - no longer identified or listed in boot order in F12 boot options menu
I am in need of direction...I need to send this out of warranty but great laptop to Dell with my disks for setup and basic OS software/Dell Driver installation.
I suspect my BIOS is way to early...but knowing that any glitch on that update will render the MB useless...
Any advice would be of great assistance.
Thanks
MD
