Microsoft PC Manager includes a Deep cleanup feature that can slow down system performance by deleting Windows Prefetch files, which are intended to improve application loading times. The System protection feature focuses on restoring default settings rather than providing robust security options, which may not appeal to users who prefer customization. The PC Boost feature offers only temporary relief from memory usage, with results quickly reverting back to previous levels. Additionally, the app promotes Microsoft Edge, often ignoring users' default browser settings, which can be intrusive and detracts from its overall utility.