I cant even get into f2 or f12 says TFGHT is compressed Ctrl+Alt+Del wont even work 
I have a a 14z that does not boot it Blue Screens with a IOSTOR.SYS error - I have tried a repair and it doesn't boot far enough to do a repair fails with the same error. I have also tried putting in a Windows 7 DVD and doing a repair it does not recognise the HDD at all I have disabled the Intel fast start (cache) no difference I have run F12 and done full diagnostics all pass okay on both hard drives (I assume ones the cache and the other is the Hitachi drive) I have removed the drive and put in a caddy and tried in another Windows 7 computer - and it recognises the drive but asks me to format it which I don't wont to do as I have really important docs on my computer. Any help or recommendations would be gratefully appreciated. Thanks Duncan  
Inspiron 14z 5423 BSOD IOSTOR.SYS will not boot