i need help in removing registry files of those application i have uninstalled(eg: like photoshop,nero burner etc).i am losing memory nearly 50-60Mb after uninstalling them when compared to before install this type of applications.so iam losing lot of memory how can i get memory back.by defragmenting i get nearly 5-10 mb back. benerjee

Try emptying the recycle bin. I suspect that you mean you are losing 'disk space', not memory. I don't think you want to (or need to) mess with the Registry.

http://www.ccleaner.com

Don't mess with the registry files, especially if you don't know what you are doing. If you delete the wrong registry key you could completely mess-up windows beyond recovery. Use a program like what was mentioned above for deleting left over registry files. Granted it doesn't get rid of all of the left over registry files but it does a pretty good job at getting rid of the most important ones. If it's broke, then blow that sucka up!

If you are using ADD/Remove Programs to Uninstall software you can minimize the majority of registry Cling-ons. Yes, you may find left-over registry entries, however there is little chance of them having any affect on RAM or disk space, since the Program files have been removed. Sometimes the Program folders are left but you can delete them if you want to. Having said all that, there is a Possibility that the uninstall wasn't complete. Especialy possible if you Deleted the Program rather than Use ADD/Remove or the Program UNinstall. If you are seeing error Messages relating to the Removed Programs this could be the case. If so, you may have to reinstall the Program then Uninstall via ADD/Remove, or the Program UNinstaller. You wouldn't be trying to make room on an almost full HDD, would you? There is nothing to learn from someone who already agrees with you.

thanks benerjee