Windows restricts low-level disk modifications to standard users. Close TransMac completely.
: Right-click the TransMac icon (on your desktop or in the Start Menu) and select "Run as Administrator" . This is perhaps the single most effective fix. For a permanent solution, right-click the icon, select Properties → Compatibility tab → check "Run this program as an administrator" . Transmac Drive Has Been Locked By Another Program
Antivirus programs, Windows Defender, and live ransomware protection tools closely monitor active USB ports. When TransMac attempts a raw sector-by-sector write operation, security software may block it and lock the drive to prevent potential malware execution. Open (or your third-party antivirus app). Navigate to Virus & threat protection settings . Temporarily toggle Real-time protection to Off . This is perhaps the single most effective fix
The lights in his apartment went out. Not a power failure – the router’s LEDs still glowed green. But the overhead light, the desk lamp, even the battery backup’s display… all dead. And from the hallway, where the fuse box was, he heard a single, deliberate knock. TransMac locks up.
TransMac requires substantial system access to interact with raw disk partitions. If you run it without elevated permissions, it won't be able to bypass standard Windows file protections, leading to the "locked" error .
This error happens because Windows is protective of its storage ecosystem. When TransMac tries to gain exclusive, low-level write access to your USB flash drive, another background process or service is already gripping the drive. Because two programs cannot control the partition table simultaneously, TransMac locks up.