DOS/WinXP incomplete boot after Autoruns (my fault)

Aloha…

I unchecked wa-a-a-y too many items in Autoruns.Upon boot failure, I tried doing F8, but it wouldn’t come up. So I tried re-installing WinXP. Now access is denied because WinXP cannot finish installing. The DOS and XP startup windows alternate.

Is there ANYthing I can do to save my poor laptop?

Tana-Lee