|I'm not much of an advocate of registry cleaners in general but using one might be your best way forward. Download CCleaner Lite - their cleaner is one of the safest. Run the Reg Cleaner and look for an entry referring to dosk_isv.dll then mark that one and get it to delete it. I suspect it is the registry remnants of some software that has been removed.|
Whether you let the Reg Cleaner remove anything else is up to you.
The alternative is to search for dosk_isv.dll in the registry but you have to be careful what you delete there.
There is one other way, see if dosk_isv.dll appears in msconfig Startup tab. Probably unlikely but if so, untick it there - very safe.
We all live on a ball.