I have a IBM Thinkpad T40p. I recently did something that I now see was unwise - I reinstalled Windows XP over an existing installation with Service Pack 2 installed. Now, I have two problems that I can't reverse - 1, Windows Installer is not working properly (hangs when installing or uninstalling many programs) and 2, When I hit the Access IBM button at boot-up, instead of going into the pre-boot menu, I get an "NTLDR Compressed: Press CTRL + ALT + DEL to reboot" error. I am ready to reformat and start over with the original configuration, but can't get into the pre-boot menu to reinstall. Any help?