startup problems

Yesterday i messed with msconfig by unchecking 2 things, both 3rd party apps that somehow ened up in the boot menu list. I clicked restart later and when i tried to start my PC today it went to a prompt that said to insert windows CD and do a repair. But whether i hit enter or esc, it just restarts and goes to that prompt again even after i put the 7 CD in. Sometimes it offers a menu to select the boot device and when it does i choose CD and it doesn't boot from it but goes to the same prompt. This goes on and on till i finally went into bios and changed the 1st boot drive to the CD. Then i get the option to repair the startup or use the sys restore function. If i repair startup I can get to windows and use my machine as normal, but next time i restart same thing happens and i'm at that prompt again. I think it's just "fixing" it by setting it back to HD for 1st boot. If i choose restore i says no image even tho sys restore IS turned on for my C drive. But if i choose startup fix so that i can get to windows, sys restore won't work because it's next button is greyed out even with my C drive hilighted. And I wanted to try "last known good config" but that never shows anywhere, be it booting from the CD or whatever else i've been offered during this fiasco. Any ideas?

System Restore - Microsoft Windows is always the option if it's accessible.
Try and see if you can be given the permission to System Restore in Safe Mode.

it wont even give me the boot choice to strat in safe mode. and restore tells me there are no restore points saved. i have permissin as i have used it before, but this time the saves are not there.

Went back to sys restore and an option was no longer greyed out....restore settitngs and previous versions of files. That was not available before, but now it is so i tried it and then when i tried to restore it allowed me to. However, when i did and restarted it went to that same prompt. It will NOT start unless i use the CD. When i did, it went to desktop and a prompt said restore was successful. But restart and agin the dreaded prompt to fix it. Only way in is the CD.

I guess i should have named this thread "windows starts normally, but only when CD is in ROM and ROM is 1st boot device in bios". I tried restore twice now. I even found a issue in bios where under "boot priority" (think thats what it was called but i may be wrong....but something similar) my C drive was second. I'm not talking about where you set boot 1, 2 and 3 etc. There i must have the CD selected as 1st as i said.

Also, like i said i screwed with sys config the day before which i'm sure is what started this. I could swear under the general tab it's always had "selective startup" checked, but now it says normal startup and i dunnow if i did that. But now if i set that to selective it still won't start w/o the CD and when i get into windows it's set back to normal startup. This may have to do with whats going on i suppose. But i have no idea what it caused of how to rectify it. If i leave the windows CD in the drive and leave the ROM as 1st drive in bios the pc works and starts up as normal. But obviously thats not a long term option.

I loaded defaults into bios and it worked. Oddly it defaults to my C drive being #3 of my 3 drives in the boot priority menu. But it works like that so what the heck.