Sumatra PDF is a PDF, ePub, MOBI, CHM, XPS, DjVu, CBZ, CBR reader for Windows

Get Daily Nag Screen to Install Sumatra PDF

I love Sumatra PDF, because it opens so many file types, especially ePub files, which seem to be replacing PDF files as the standard. Every day, around 6 p.m., I get a screen with the prompt to install Sumatra PDF. I already have the latest version installed! Why am I getting this nag prompt? Where can I locate the scheduled prompt. In other words, how do I remove it.

By the way, I get a similar install file prompt for WinZip. Just these two. Every day. These prompts are very annoying and I would like to know how to delete them.

Can someone help me, even if I have to go to the registry files?

Can you post a screenshot?
That shouldn’t (and as far as I know, doesn’t) happen.

As requested please provide a screenshot of the update message and confirm your current version as it may help identify if you have a pirate copy.
The help about screen can identify when it is not a standard release by showing any prerelease information

Whenever possible, you should always download software from the original manufacturer’s site (e.g., for WinZip, go to To disable its updates reminder see

For a valid SumatraPDF first try
if you suspect a rogue install then uninstall and download a replacement from