If you are still within warranty, contact Dell with the error code. If you are out of warranty, yes it’s likely that you will need to replace your drive.   The first step is to safely transfer your files to another drive, after which you can do further error checking on that drive.  To protect the possibility of recovering your files, immediately stop using that drive.  Do not try to boot from that drive, or you risk further data loss. The safer way to try to recover your files is to remove the drive and connect it to a USB drive adapter or enclosure, connected to another computer. 
Hello,  I am unable to boot into my Windows 10 Home operating system on my Dell Inspiron 17R. It started out with getting the following messages when I power up my laptop. Fixing (C:) Stage 1: 85% (2263035 of 2654208); Total: 29%; ETA:  0:41:12 … Fixing (C:) Stage 1: 31% (54 of 174); Total: 26%; ETA: 4:26:26 … Fixing (C:) Stage 2: 65% (2263035 of 3418816); Total: 29%; ETA:  0:41:12 … Preparing Automatic Repair Repairing disk errors.  This might take over an hour to complete. After waiting over an hour,  it just kept flashing my hard drive light on and off and never going to windows even after waiting for overnight.  All it showed is the cursor arrow.  I then went into Boot Manager using F12 and ran Diagnostics on the hard drive. it gave the following error: Error screen: Screen title = ePSA 4228.25 Tag BIOS A14 Error Code 2000-01 42 Validation 73999 Msg: Hard Drive 0 -S/N S2WZJ90D463419, Short self test unsuccessful  Technical Support will need this information to diagnose the problem. Please record the above Error and Validation codes. Do I need to replace my hard drive? Any help would be gratefully appreciated. Thanks,Tony  
Inspiron 17R 5721, unable to boot into Windows 10