Storage [Q] Windows 7 doesn't recognizes HTC DHD after flashing Cyanogen Mod 11

Hello,

I flashed Cyanogen Mod 11 on my Desire HD successfully using the Clockworkmod. Afterwards i wanted to flash the boot.img, but Windows 7 doesn't recognize it anymore. (it has before)

I tried to uninstall and reinstall HTC Sync and some other Drivers, but that doesn't help.

What could I try now?

Thanks!


[Bootloader is unlocked (HTCDev)]