i came across a strange bug in a game. for some reason, when not running with admin rights, it fails to create .cpx files (returns INVALID_FILE_HANDLE and lasterror ERROR_ACCESS_DENIED)

after wasting some hours looking into it, i discovered it was simply because the .cpx extension

anyone can think in a workaround to fix this weirdness? or any info about this 'blacklisted' extension?

Don't know about that. But today, I wasted the whole day on another strange behavior.

I named my demo application "setup". So it compiled to "setup.exe".
While running it from fasmw, nothing happend. Absolutly nothing.
But running it from OllyDbg (with admin rights) it worked perfectly.
Till I found out, if it is called setup.exe, you have to execute it with admin rights.
Even if it is called setup_xyz.exe. But if you call it xyz.exe (or anything else) it works perfectly.
So if it is called setup.exe, you have to run the with admin right, else not.

(Windows 8.1)

upsurt
Have a look at the paragraph "Installer Detection Technology" here.

P.S. Sorry, can't say anything on the original topic, never experienced that. My best guess would be to blame some stupid antiviral software.

The whole UAC and detection thing is honestly just stupid. Why not have Windows applications use permissions like Android does.

It would make things much simpler if an application would crash when it tried accessing the disk or capturing a screenshot or fucking with another process or accessing the registry without declared permissions and at the same time giving the user the power to revoke those permissions (programmatically with API as well).

Think of it as passive vs the "active" UAC that pops up every now and then.

If someone came up with that type of OS, MS could be put in a pine box for sure and I'd finally get to buy an operating system.

Thank you!! Didn't know about that.

By the way: Installer Detection only applies to 32 bit executables