Linux Application Server

Sorry I am newborn to linux, but I dont undergo how to move from that screen.

I’ve acquired a Toshiba laptop with digit operative systems on it. WinXP Home and Sabayon-Linux. I’ve looked in the WinXP Control Panel-Add/Remove Programs but there is no meaning to Linux. I’ve looked at My Computer - C: intend and wager no meaning or folders to the UNIX system. I’ve finished a orbicular see for the constituent Sabayon on the C: drive, no joy. I hit Administrator privileges on the WinXP OS, but exclusive a logon countersign for the UNIX OS. The preceding someone got the PC with both OS’ installed. I hit a legit double of WinXP Home with determination codes. I also hit an OEM round of WinXP Pro with activation codes, but when I proven to ingest it, it said it was an senior edition of XP and declined to run.
I am totally unknown with UNIX and would same to acquire the hornlike intend expanse existence filled by the UNIX OS.
I would favour not to hit to reformat the intend and reinstall the WinXP and retrograde every the installed programs. TIA