[JohnTHaller]

"It works for me" is a great first step. More specifically, it works for me on Windows XP, Vista, 7, 8, and 10 TP (since they're all ready in virtual machines) is an even better one. Followed up with the usual questions of What operating system are you using? 32-bit or 64-bit? What's the full install path? What antivirus product and version is running? What software firewall, if any, is running? Any other apps running? New install or upgrade? Etc. I have some of this built into the About box of one of my apps and am adding in the rest shortly.

Quite a few "bugs" are no fault of the developer/publisher. But learning where those issues are and letting your app alert/inform the user what's going on as they install to an invalid location or break their TEMP directory thinking they're protecting their machine or remove IE from Windows using a broken 3rd party utility or use an antivirus product that gets more wrong than right, etc... can help cut down on the bug reports, help the user from making 'mistakes' they shouldn't be allowed to make, and just make the whole process easier.