Computer Lags when updating game

No matter what size the update is for Rust whenever I update this game it just completely ruins my computer until it is done. It freezes everything and I cant use my computer for anything until the update is done. This is the only game in witch this happens and I cant figure out what it would be that's making this happen. Is there anything I can do to prevent this from happening? If so let me know please because I have been dealing with this issue for the last 6 years and I'm getting sick of it.