how to restore to previous time stamp through bios,laptop

[ska_ter18]

hello...i got a problem with my laptop running windows 7.
a lenovo model.

installed veriface that scans your face as a password.

uninstalled it and there is a password set that i didnt set.as i red through internet veriface have god that thing.

so i am not able to access my comp anymore as i cant log in.i dont want to format because ill lose all personal data...or this is what i think..
but despite that i would like to know whether i can roll back to previous time stamps through bios or F8 menu to a time where i still had veriface and could access my desktop.

and\or i would like to know whether i could reinstalled windows and keep all files,but then again i think they will be password locked.

i can reassure that this laptop is not stolen in any way.there is evidence like the receipt from the store that i am the owner and all manuals and everything. i just need to save my photos.

help would be greatly appreciated

[AnnMarie]

Hi ska_ter18. I believe you when you say that you do own this machine but we cant help you with this issue. The CTH Terms of Service prevents us from offering information on how to bypass computer security.

Isnt Veriface Lenovo software? If so, you will have to contact their support.

[ska_ter18]

thank you for taking time to answer me.i will try to contact the support.

[AnnMarie]

Good luck ska_ter18.