During the installation of a screenprint tool named SnagIT the setup asked me to provide the unidrv.dll and unidrvui.dll files. I tried two directories c:\windows\inf and c:\windows\system32\drivers but in both the files were not available.

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The message above was shown. My installation of the application succeed but after the reboot it started asking for the application printer which was not installed because of the missing files. I uninstall the application and started again but now with some hints where to find the files.

If you encounter that these files are missing please follow my guides below:

Start “Command Prompt” and type dir unidrv*.dll /s to search for these files. I was lucky and I found mine hidden somewhere(C:\WINDOWS\system32\spool\drivers\w32x86) on the harddisk .

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If you can’t find the files than open the following file if available C:\WINDOWS\Driver Cache\i386\sp2.cab and extract the two dll’s.

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This fixed my problem and without downloading un-trusted DLL’s from the Internet. You can search for these files but be sure what you are downloading from the web.