I am trying to delete a file and cannot do it. The message says unistall shield missing from file. When we go into the computer file it says to use CD #3 which is missing, and was never included in the original package at the time of purchase . Please help. Thank you. Tineke

I have had a similar problem a few times and in desperation the first time, I found the file on the hard drive, opened the file and began deleting the many programmes it contained piecemeal. Long and tedious work...

When I grew bored I closed the file and was able to delete it.

Trying it again on other unwanted files I found I could delete all the programmes the file contained but not the file itself.

There are clean up utilities available for download - the free versions are a bit limited but the paid for versions are reputedly quite good. I have used the free version of CCleaner for a few years without problems.