1. open cmd via Administrator mode
2.type diskpart
3. list disk
4. it will show all disk then choose your flashdrive disk ex. disk 2
5.clean
6. create partition primary
7. select partition 1
8.active
9. format fs=ntfs quick
10.assign letter= N
--> Now this is a bootable flashdrive but we need to put the files OS Setup
11. copy all files in OS then paste it in your bootable flashdrive
12. end
You can reformat your pc by this bootable flashdrive
2.type diskpart
3. list disk
4. it will show all disk then choose your flashdrive disk ex. disk 2
5.clean
6. create partition primary
7. select partition 1
8.active
9. format fs=ntfs quick
10.assign letter= N
--> Now this is a bootable flashdrive but we need to put the files OS Setup
11. copy all files in OS then paste it in your bootable flashdrive
12. end
You can reformat your pc by this bootable flashdrive

kasi hindi ako gumagamit ng thirparty software para gumawa ng bootable flashdrive 
