Lets say u don't have AV on ur PC & u got a pen drive which u know is definitely infected. but u need files on pen drive as they are important.
Well its quite simple.
just follow the steps
1. B4 plugging in pen drive, disable the autoplay function for the pendrive.
I am on win7 so i know path for it is:
Control Panel\All Control Panel Items\AutoPlay.just uncheck use autoplay for all media & devices.
other users can google how to disable autoplay for their OS.
lets say u dont wanna disable autoplay &f autoplay window appears, then simply choose take no action. but i will insist on disabling autoplay.
2. open my computers & check the latter of the pen drive. lets say its H.
3. close my computer & hit start>run
4. in RUN type H: (pendrive letter : )
5. now don't even touch CRTL+A (i.e. select all).
6. just select the file u wanna copy (incase of multiple files, use CRTL & click needed files w/o releasing CRTL)
7. copy files to ur HDD.
8. unplug pendrive.
I;ve tested this method, many times. it works.
this method can also work if u wanna transfer files from pen drive to infacted PC w/o getting pendrive infected.