hello could anybody tell me if it is ok to multi task your computer while dvdshrink is encoding a disc i realise not to multi task when burning but unsure about encoding. many thanks 
Sure why not? But it might run slow.
Hard to answer depends on cpu speed, total RAM, Hard Drive and what in running in the background. Best not to multi task to avoid any problems
It’s a computer. Things are on or off. Doing other things won’t garble the output of DVD Shrink or anything. But it will probably slow them down.