For Windows: For example, you have compiled a killer USB PC repair kit is filled to the brim with antivirus, file recovery, and adware removal tools, but shortly after you plug your thumb drive into the infected machine in the middle-you-thumb drive repair You might also be affected, this could be horrible. Freeware application Thumbscrew portable thumb drive to protect you from the writing so that your data remains safe no matter where it is installed in, even if you do not need it for the purpose of improving the PC, it can still be useful to keep your files safe from kids or something else along the line. Thumbscrew is freeware, for Windows only.
Thumbscrew is a poor effort on people who will be a USB write blocker. When used allows you to quickly enable or disable writing to all USB mass storage device on your Windows system. In other words, you can use it to make USB flash drives, hard drives or IDE / SATA drives in the enclosure read only. However, do not make warranty to the validity of these forensic. However, if you're poor and you want to play around with making a forensic image thumb drive and USB mass storage device might be useful. You will see one of two icons in your system tray to indicate whether or not USB mass storage device set to read only
Applications can be downloaded here