winaspi.dll is the ASPI driver used to control CD-ROM drives, CD/DVD writers, and tape drives and is often required by CD writing, ripping, and backup software.
Non-system processes like winaspi.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you
check your registry to identify slowdown issues.