The Prefetch folder is not really a data storage folder. It just keeps track of what software
you open most frequently, so Windows can pre-load part of that software when you boot
into Windows to help make Windows more responsive.
Prefetch is just one part of having good Windows performance.
- The Prefetch information being deleted is not critical as the information will be restored before long, and the performance boost that is derived from Prefetch is not more than several seconds when opening a software or booting into Windows .
Doing a System Restore should restore your Prefetch data, but not for long if you have a
software installed that is deleting it.
As to the cause of the message, I'm not sure, but -
- If you are using a 'tune-up' or 'optimising' software that may be what is deleting the Prefetch data.
This sort of program is often a case of, 'the cure is worse than the disease'.
If you have one installed, uninstall it.
- I'm not sure if it affects Prefetch, but when shutting Windows down you should always use the
Start button menu option rather than the on/off button on the machines case.
Windows does write information when it is being shut down properly via the Start button menu.
I've never seen a message to the effect that the Prefetch has been deleted when needing to do a 'hard'
shut-down or reboot via the case button though.
- Prefetch is normally disabled when using an SSD as it is not really beneficial with SSD's,
but with traditional HDD's Prefetch should be left enabled to keep the system a bit snappier.