Long-time occasional reader, first-time poster, so I apologise if I'm not doing this exactly right as yet.
I can usually figure my way through OS issues, whether it's virus, spyware, Windows just being Windows, whichever. But this is a new one if you're me. On Windows 7 64-bit, IE 11 will sometimes decide not to download a file when I tell it to. There's no error message, no download prompt, it just sits there - and very occasionally will decide to refresh the page. Right-clicking and "save as" brings up a dialogue where the filename's been sufficiently mangled such that IE isn't entirely sure what I want to do with it. For example, if I'm downloading combofix.exe from this site, IE will change the filename to combofix_exe instead.
A restart usually fixes it, at least temporarily, which tells me something either Windows or IE isn't letting go of during daily use might be possibly complicating matters somewhat. I can also, if I don't feel like (or for whichever reason can't at the moment) letting the system restart, run IE as administrator and it'll occasionally let me download what I'm after. For clarity, this is *any* file of *any* type, not just applications - MP3 files, PDF's, take your pick.
I initially suspected spyware or something, since I've seen that do similar tricks before. Ran MSSE, Super Antispyware and Combofix, two of which I had handy and one of which I paid for years ago so thought I might as well take it for a spin and see what it turns up.
MSSE and SAS came back clean. Combofix found sfamcc00001.dll, sfareca00001.dll, and one other that it removed - but these two kept coming back. Google took me to this Bleeping Computer thread, which pretty much confirmed I wasn't dealing with an infection issue (related: SpeedFan could probably stand to document those files somewhere useful). So now I'm stumped.
Besides infection scans, I've:
* Double checked IE settings (reset them twice, for safety)
* Confirmed the option not to save encrypted pages was disabled (An old IE workaround that doesn't seem to apply in my case)
* Tried with protected mode turned off (another workaround that didn't fix the issue)
* Ran with no add-ons (basic troubleshooting step, which also doesn't fix the problem)
What makes me suspect something's dangling that ought not to is, as I said, I can restart the machine and things will behave as expected. It's just somewhere along the way IE reverts to mangling files for no apparent reason. IF I can provide anything more useful, I'll be more than happy to. Unfortunately, since this isn't exactly something I'm sure on how to pull a log from, what you see at the moment is what I've got.