Yeh try kerein k Windows ki CD lein aur phir CD se hi Windows boot kerein aur USB bhi laga dein. Jeb partitions wali option aaye tu us option mein se USB wali partition ko delete ker k format ker dein NTFS pe. Aur phir system ko normally restart kerein aur deaktop load hone pe USB dubara laga k dekhein.
Bookmarks