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