Vista will not boot into Safe Mode/Normal

After I installed AIM, it started randomly crashing which led me to

uninstall it. After that, it prompted me to restart, which I did.

Then my Windows Vista would not boot after the little green progress

bar, so I went into safe mode and used system recovery to restore my

computer to 3 days ago.

After I did that, even safe mode would not boot up.

And here I am now, I can't boot from a CD since it's an upgrade disc,

so what do I do?

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skatj