Invalid partition table error

Hi,
I am using a Dell Latitude 3550 laptop.
I had two OSes (Windows 10 + Linux) on this system.
Today I decided to remove Linux and use just Windows 10.
I removed through Disk Manager the two partition belonging to Linux (root and swap), and extended my Windows volume to whole disk.
I also used this command:

Code:

c:\> bootsect /nt60 c: /mbr

to remove "grub" bootloader (which I don't need anymore).
After reboot, I got error "invalid partition table error".
How can I fix this?

p.s. I use "legacy" bios mode, not uefi.
Thank you very much

I don't dual-boot [have enough computers not to have to] but it seems to me you took too much out. I'd boot to a Linux LiveDVD such as Mint and try to save any data you need, that exists nowhere else, to a USB drive and reinstall/reset Win10. A clean install will remove everything and should create any partitions it needs and may change from MBR to GPT/UEFI, whatever the BIOS supports.
DistroWatch.com: Put the fun back into computing. Use Linux, BSD.

Berton said:

I don't dual-boot [have enough computers not to have to] but it seems to me you took too much out. I'd boot to a Linux LiveDVD such as Mint and try to save any data you need, that exists nowhere else, to a USB drive and reinstall/reset Win10. A clean install will remove everything and should create any partitions it needs and may change from MBR to GPT/UEFI, whatever the BIOS supports.
DistroWatch.com: Put the fun back into computing. Use Linux, BSD.

Hi Berton,
I could reinstall Windows 10 (this will surely work :) but, sincerely, I don't think this is the only option.
With a Linux CD I checked and I am able to mount Windows partition and access to my data.
I hope there is a fastest solution to recover OS.
Thank you

Hi, problem solved with testdisk utility (from a Linux live CD)
I simply let testdisk guess partition layout, write MBR, et voila'