The install.res.1028.dll is just a small part of an entire set of temporary files that are automatically generated on the root directory of the drive that has the largest available space (from the entire system). These files are known to appear right after the user installs the Visual C++ 2008 Redistributable Package (VCRedist_x86.exe, VCRedist_x64.exe, VCRedist_ia64.exe) for Visual Studio 2008.
Why does this happen?
This is definitely not normal behavior. The apparition of these files on the disk with the largest free space is the result of a known bug of VCRedist that was fixed in ulterior DirectX Redistributable Package releases.
These files are generated by the installer and are supposed to be generated inside the temp directory. Instead, the files get erroneously generated on the root directory of a drive that has the most amount of available space.
Are the files safe to delete?
Yes. The files are completely unnecessary and can be safely deleted from your system. Any other Windows component including the runtime library will not be affected by the deletion of these files. Here’s the full list of the files generated by this bug, so you’ll know what to delete if you decide to get rid of them: