go to c:\ and open boot.ini file ( you have to allow see hide files over tools/folder options/view/ and show hidden files, folders or drives
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(2)\WINDOWS
[operating systems]
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS=”Microsoft Windows XP Professional” /noexecute=optin /fastdetect
multi(0)disk(0)rdisk(0)partition(2)\WINDOWS=”Safe Mode” /safeboot:minimal /sos /bootlog