So, these are some of the significant causes of 100% Disk Usage and that makes your computer sluggish and vulnerable. Corrupt, broken, old, or faulty system drivers.However, there are numerous causes of this problem but here are core ones. Then, this write-up will elucidate how to fix this issue quite quickly.īut, before moving forward, it would be better enough to know about the causes of it for future prevention. If you are suffering from slow performance of your PC and don’t how to fix it. Plus, this drives a lack of resources to other programs and thus results in slow down issues. When a specific program demands more memory than expected it usually happens. Disable Windows Update Service What Causes 100% Disk Usage In Windows 10