crcdisk.sys not loading with vista on dell notebook ubuntu works fine.?

If I understand your question correctly it sounds like safemode freezes at crcdisk.sys and you are also unable to do a clean install. I've seen similar issues many times with vista usually caused by malware corrupting system files or botched windows updates. (sometimes both) I have Ubuntu on a flash drive and it works every time when windows doesn't.

You should be able to do a clean install of windows though. I'm not sure if you're using a legit copy or not but I have found that certain DVD drives just don't work for installs. Since you said you've already successfully installed off that drive it makes me wonder if the HD is possibly failing. Have you tried formatting the drive and doing a reinstall? It's possible the MBR was corrupted.

MBR corruption bro.

You have to clean slate your harddrive.

To do so use a buddies desktop. Hook ur harddrive in, and move everything in the trash and empty it. Than re-install windows.

Than ur set