Dell Inspiron 9100 factory restore

[MasterLocke]

Anyone knows how I can restore my DELL laptop to its original factory settings?
The windows XP restore only bring it back about 2 months.
It did not come with any CD that say "System Restore".

I have had this laptop for about 4 years and it's starting to be slow.
Thank you

 

[kimsland]

It did not come with any CD that say "System Restore".

Just about all newer latops don't come with CDs either

They have a hidden partition accessed by pressing a certain function key (like F6 or F10 or some other key on system startup)
If you have one of these hidden partitions (and therefore a startup screen prompt) select the key that starts the System recovery.

Or chat with Dell, if yours has that option: https://www.techspot.com/vb/showthread.php?t=100658&highlight=Chat