If your hard drive was big enough, there's a small chance that the bitcoins can still be recovered. Stop using that hard drive immediately, and try this:
http://forum.bitcoin.org/index.php?topic=25091.0
Topic: Where did my BTC go? (Read 727 times)
Sad story
that sucks, but i hope other people see this and backup their wallets, im really upset with myself but i didnt know/think about it so i guess i cant be too mad. Though i just lost alsmost 200$ 
Im going to quit bitcoins now..........bye
Im going to quit bitcoins now..........bye
And this is why you test new things *slowly* with small slivers of your funds.
Hell for $200 I would have gladly taught you how to do it securely.
that sucks, but i hope other people see this and backup their wallets, im really upset with myself but i didnt know/think about it so i guess i cant be too mad. Though i just lost alsmost 200$
Im going to quit bitcoins now..........bye
Im going to quit bitcoins now..........bye
your information from 1st post shows that you formated your hdd
and if you didnt backup your wallet.dat from dir described in bitcoin faq
than you will never have that money again
edit
wait, u said that you sended money to some other address, which is related to old bitcoin install or the new ?
and if you didnt backup your wallet.dat from dir described in bitcoin faq
Quote
Windows
Go to Start -> Run (or press WinKey+R) and run this:
explorer %APPDATA%\BitCoin
BitCoin's data folder will open. For most users, this is the following locations:
C:\Documents and Settings\YourUserName\Application data\BitCoin (XP)
C:\Users\YourUserName\Appdata\Roaming\BitCoin (Vista and 7)
"AppData" and "Application data" are hidden by default.
Go to Start -> Run (or press WinKey+R) and run this:
explorer %APPDATA%\BitCoin
BitCoin's data folder will open. For most users, this is the following locations:
C:\Documents and Settings\YourUserName\Application data\BitCoin (XP)
C:\Users\YourUserName\Appdata\Roaming\BitCoin (Vista and 7)
"AppData" and "Application data" are hidden by default.
than you will never have that money again
edit
wait, u said that you sended money to some other address, which is related to old bitcoin install or the new ?
the adresses are related to your bitcoin wallet
and wallet is the only thing that matters, not bitcoin executable
and wallet is the only thing that matters, not bitcoin executable
I dont think i have the wallet for my old address? Where is it located? If i dont have the wallet did i just send all my BTC to an address that doesnt exist?
the adresses are related to your bitcoin wallet
and wallet is the only thing that matters, not bitcoin executable
and wallet is the only thing that matters, not bitcoin executable
So i wanted to trade in my BTC for a gift card, so i withdrew all my coins to my receiving adress. Then i open up bitcoin.exe and it shows that my address for receiving coins is completely different, i researched it a little and found out that it changes and that i should be able to see my old address in my receiving address list. Well i formatted my computer a month ago, but im still using the same .exe as before, and now when i check my receiving address list my old address (that i use with bitcoin market and deepbit) isnt even in teh list, did i just loose all of my BTC or is there a way to access my old address?
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