If you want to use the system other than in safe mode, you need a new, 2.5" 9.5 mm SATA notebook drive.

is there anything else i could do? the laptop is still usable...in safe mode.

Your hard drive needs to be replaced.

Hi,

I had this exact same problem on my Studio 1555 and believed I had no option but to buy a new hard drive, having searched around for a solution.  However, I managed to restore the computer from some Dell Data Safe backup discs I created, and now it works as new.  I also had other error codes such as 4C00:0320, and 0F00: 1332 plus a few others, but now everything is fine.

Thus if you have created such discs, or perhaps a system restore point (not certain this will work, as I didn't use it myself), and not forgetting the OS installation discs, then you can likely save yourself some money and hassle and restore your laptop.

I haven't managed to find the files that were supposedly being backed up during the recovery process, but I transferred them to another laptop via USB stick in Safe Mode.  If your files are not backed up on disc/USB/cloud space, then make sure to do so before attempting to recover your system, as above.

Hope this helps

Hi my laptop have a code 0142 error I have a studio 1735 I call dell and they told me that it's a hard drive problem, how do I know if it's the primary or secondary hard drive? And if I need to replace it, can be replace for a bigger memory?  Anyone know?  Thanks

Run the diagnostics (F12 at powerup), which will tell you which drive has failed.  Yes, you can install a higher-capacity drive.