will time machine reinstall every thing that I had before ?

I have doubt .

can time machine save and re install every thing fe. the photoshop ?

or other important systems. its really important for me because I don't have the CDs. and if I lose them it cost me a lot to buy them again or waste my time to collect al my application. i need them immediately because I'm Master student and my laptop is my everything.

 

actually not with my laptop . my Isight camera has problem it does not work . and I think I should clean install . and most of my applicants ordered directly Online (No CD) I don't know how can I reinstall them
where can I find all the original install icon on my laptop to burn them in a DVD.

and now I 'm writhing my papers for masters. I have back up of my important things but hate to clean install. because i'm very bad at computer and such thing and its very difficult for me to do all those thing . this is first time that I want to do it with mac.
first time my brother prepared every thing for me and give a prepared laptop to me. and now he is not here.

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by the way I know that there is a way to reinstall the "lion" with out erasing the application . can I use this way ?

if yes is there any explanation here "in this forum" that help me how to do that . any link ?

 

mac book pro 13"
year : 2012
version : Mac OS X 10.7.5
processor : 2.4 Ghz Intel Core i5


no unfortunately the Camera is not there (under the USB) I don't know what happened suddenly it was OK since 2 or 3 weeks ago and suddenly I noticed that I can not video call with Skype, at first I though this is Skype problem but now I see that there isn't any camera .

Is there any driver for Camera (Like windows) that I could install ?

by the way I did SMC also . but


this is the message when I want to open face time :

4/12/13 2:42:51.393 PM FaceTime: [Warning] could not start preview, error: Error Domain=GKVoiceChatServiceErrorDomain Code=32017 "Could not start video previewing" UserInfo=0x7fe5e6161ba0 {NSErrorUserInfoDetailedError=108, NSLocalizedFailureReason=Video unavailable, NSFilePath=/SourceCache/AVConference/AVConference-245.23.4/AVConference.subproj/Sources/VideoConference.m:3957, NSLocalizedDescription=Could not start video previewing}


In "photo booth" I see this message on the screen : there is no connected camera .

thanks for your help

 

thank you very much for this I didn't know that. so my brother might have the e-mail he ordered and installed it with his e-mail .

I don't know what happens to my camera suddenly. but I hope I could fix it myself very soon. and want to do it with out telling to other because :

my biggest problem is that no one has mac. Therefore they can not help me, and on the other hand they always blame me for buying mac . and tell me : see this is the biggest problem of mac. now how could you solve the problem now ? solve t if you can . if you had windows we could help you easily.

I want to learn every thing myself .