Update Windows 10 to the latest build on Dell Vostro 3550

On my Dell Vostro 3550, I have updated from Windows 7 to Windows 8 to Windows 8.1 and then finally to Windows 10 when it was launched. I have noticed recently that my machine is not ruing the latest build and is still ruing build 10240 which I believe is the release build.

I have tried fixing Windows update errors and updating the system to latest build, but every time it fails without giving much insight to the error. I have checked Dell Website and this model is not listed for November update here.

I want to know if someone has succeeded in updating to Windows 10 on this model and if yes, what steps can I follow to do the same. If the answer is No, please guide me with other available options.