will cause a large amount of disk activity for their duration. After the bulk of these have completed Windows runs an additional set of performance optimisation tasks which will take a few extra reboots to complete. In order to improve start up times for your most popular applications Windows monitors those most commonly used and, over the course of the next few reboots, moves the files needed to run these applications onto the fastest access section of your hard disk. The length of time taken to complete these disk optimisation tasks can vary greatly, and is dependent on how many times a week you reboot your workstation. In normal use, they should be complete within 2 weeks of the completion of the upgrade and are given low priority by the operating system so should not impact on its performance.I've just been upgraded to Windows 10 and now my PC is running slowlyed in the article The tasks broadly outlin