Are my Bitcoins lost?

[cp1]

Try:  C:\Program Files (x86)\Bitcoin\bitcoin-qt.exe -rescan

[binaryFate]

I sent you a PM, worst case I can do it for you, but you'll have to trust me 

[neurobox]

PM'd you as well.. would be glad to help..

or if you want to have a go, i'd suggest running a search of the whole machine for wallet.dat and hope that one turns up with a pre-re-install modified date, copy that for backup, and attempt to recover by loading it into the new install and re-scanning

All this can be done without exposing the private keys.

If you're pretty sure the .old copy was overwritten somehow, copy it elsewhere for backup anyways, right-click the original for Properties, and see if you have "Previous Versions" you can restore. This feature may or may not have been set up automatically..

[grue]

1. open c:\windows.old\ with windows explorer
2. in the search box to the right, type in "wallet.dat"
3. copy (don't cut) all matching files to a folder on your desktop
4. open windows explorer and type in "%appdata%\bitcoin\" in the address bar
5. if wallet.dat already exists, make a backup of it
6. delete everything in the folder
7. paste one of the wallet file from step 3
8. start bitcoin-qt, check if there is non zero balance. unconfirmed balance is OK. you do not need to rescan
9. repeat step 6 to 8 until you found your coins.

If you need additional help, I can VNC/teamviewer.

[BitcoinBarrel]

You might consider trying this:

https://bitcointalk.org/index.php?topic=25091.0

It's recommended though to force shutdown the computer immediately for highest chance of success so temporary files aren't deleted. If you've shutdown and restarted several times it might be harder. Read it and good luck

[brudog]

 
  grue, I did what you said there were two wallet.dat files I put them in folders on desktop,  saved the wallet.dat file in %appdata%\bitcoin to flashdrive and deleted.

added wallet.dat file and put each one from desktop, both bitcoin qt wont start now  says wallet.dat corrupt,salvage failed.

tried to install original wallet.dat from flashdrive and same result...

   I appriciate everyones help today, thanks.....I got to go until tommorrow, check back then.

[grue]

 
  grue, I did what you said there were two wallet.dat files I put them in folders on desktop,  saved the wallet.dat file in %appdata%\bitcoin to flashdrive and deleted.

added wallet.dat file and put each one from desktop, both bitcoin qt wont start now  says wallet.dat corrupt,salvage failed.

tried to install original wallet.dat from flashdrive and same result...

   I appriciate everyones help today, thanks.....I got to go until tommorrow, check back then.

It sounds like you misread the directions. It's very unlikely for multiple copies of wallet.dat to all be corrupt, and even less likely for a fresh, working backup to be corrupt as well. I can use teamviewer and attempt a fix, but if you think you followed the instructions correctly, it's best to check this: https://bitcointalk.org/index.php?topic=25091.0

[brudog]

   Thanks to all you good people that have tried to help, I got my bitcoins back..I am so happy. Special thanks to binaryFate.

   It's gonna be a great day!!

[binaryFate]

   Thanks to all you good people that have tried to help, I got my bitcoins back..I am so happy. Special thanks to binaryFate.

   It's gonna be a great day!!

Glad I could help. Don't just be careful in the future, be paranoid with backups