I rarely re-install, rarely have to tbh. keep things clean and tidy on the laptop, don't randomly install software and the likes - makes life much easier. tis 3 1/2 years old now and I only re-installed once back in Feb this year after an issue which would not go away. re-installing resolved that problem - but it was a last resort. One of my brothers on the other hand has been through 4 desktops in that time, and I actually mean hardware not re-installs! Has been a really good laptop this one despite spending the first 12 months of its life in a pannier on tour!