I bought a refurbished laptop from Dell. It had a Pentium i7 processor and 8Gb of RAM but from the start, it was slow, with disk usage constantly being at or close to 100%. I should have just sent it straight back, but I didn't have a spare computer and I couldn't be without one. Also, I didn't want to go through all the research again. I spent hours on the phone with their support person doing, what I now realise was just running through a list of standard checks and procedures. Eventually, they came and collected it and, after a few days, sent it back with no changes made to it at all. I persevered with it and eventually made a complaint via Resolver.co.uk. That got a result, and someone rang me and took me through some steps that helped. However, a year later, disk usage is frequently running at or near to 100%. I don't game or watch films or run any resource-hungry programmes and I don't have hundreds of browser tabs open. I keep my anti-virus and anti-malware software up to date and have plenty of spare disk space. I feel that a PC of this spec should not be struggling with what I use it for.