previous windows doesn't show at boot up anymore

[wajed]

windows crashed (got blue screen of death.) After that, someone did something to my PC and eventually I couldn't see the OS selection boot screen anymore.

Now I have installed another windows 7 on Drive "D", but I need to be able to boot from my previous OS to get my bookmarks and so... the question is, what can I do to boot to my previous OS?

[Guest]

Use EasyBCD (just google it) to add the missing entry.