Can I recover files that have been automatically cleaned by the computer?

Before need to install a software, but because the system is not very compatible, so I will be my computer's registry modified a bit, I hope to meet the requirements of the computer, but in order not to let the system has any problems, so I will delete a registry information to the backup down, placed on the computer's desktop, Originally thought that these two days will need to deal with the work has been processed, then the software uninstall, and then the registry information to restore back, but did not think, it is so two days of time, there is an accident.
Saying that these two naïve is very busy, often boil all night do not say, the computer has not been closed, so it is very easy to deal with the matter after, I was really tired, directly on the table fell asleep, according to mother said shout for a long time have no response, only hear my snoring voice. When I get up, want to restore their own computer, found the desktop pop up the system garbage file processing complete information, originally this also did not have anything, I set up in the idle to clean up the system garbage, but let me depressed is, I can't find my registry information on the desktop, this How is good?
Whether it is the Recycle Bin or where, I really can not find my backup of the registry information, what to do? According to many online users, this data loss is can be small, not recover words, may cause a lot of software can not be compatible. In the end, my friend introduced me a Dragon data recovery software , the role of this software is to recover the lost files back, and only spent less than half an hour, I really will lose the files found back, this software is very useful.

Can I recover files that have been automatically cleaned by the computer?