Do most of the folder names look similar to this?
folders are created when you install a Microsoft Service Pack, a Hotfix, or security update. When using Windows Update, Windows creates binary folders named "$NtUninstallKBxxxxxx$" which are highlighted in blue due to compression and hidden by default in the C:\Windows folder or C:\Winnt folder.
By design, Win XP compresses files that do not get used frequently and displays those files in blue. If you wish to change this, open Windows Explorer, click Tools > Folder Options > View > Advanced settings: Show encrypted or compressed NTFS files in color. Or you could right-click the file/folder, select Properties > Advanced button and uncheck "Compress contents to save disk space".
These folders contain the files necessary to uninstall a Microsoft Windows update that has been installed on your computer. You will not see them unless you have Windows reconfigured to show hidden files/folders. If you delete these folders, you loose the ability to uninstall those updates.