Constant loss of file mfc100u.dll

Update your anti-virus software. I probably has a false positive on this file and deletes it or puts into quaranteen as suspect virus. Or change your anti-virus to something better, maybe Microsoft Security Essentials - free for every legal Windows user.
 
Greg

Greg,
I am having the same exact problem and it appears that it surfaced after upgrading to 7.23.02.  I am now testing a base install, without the patch, to see if it disappears.
Mehdi

No, my antivirus does not flag this file as having an issue.  Nothing in the History tab of Microsoft Security Essentials as being Quarantined items. I have now stayed on version 7.23.00 for several days without issues.  I have ignored the request to update.  I'll watch is for another week or so and then upgrade to see it the upgrade does something.

Bonjour,
I have the same exact problem. I've doing a fresh install of 7.25.4.0
Hypersnap does not launch at startup and manually because msc100u.dll is missing. I'm using Avas Free Antivirus and nothing about quarantined items about it.

I really don't know what causes the deletion of this file on some systems. The copy of it is installed with HyperSnap 7, in the same folder where the rest of the program files. Why something would remove it, is beyond my understanding, unless it was a misguided anti-virus software...
 
Greg

I've found the same thing. I've installed and removed and reinstalled 7.26.02.  I had to replace the HDD in my HP Notebook and reinstall Windows 7 pro from scratch because the diskset created when I first bought the notebook was bad. I was using MS security and firewall when I installed Hypersnap back on my system. I am now using Zonealarm Extreme security. Nothing showed up in the security logs suggesting mfc100u.dll was removed. Searching my Windows folder, Windows 7 Pro shows microsoft  has installed their own version in the windows\system32 folder. I've tried installing MS Visual C++ 2010SP1, 2008SP1 and 2005SP1 per posts on MS and other locations. Yet, everytime I restart my pc, the same message pops up.  Why would mfc100u.dll be installed by the program setup? Shouldn't setup check if the file is already installed on the system before installing its own version?
I've used HyperSnap for a very long time, and it's at the top of all my most-used apps. Hope you can pinpoint why this happens on some peoples' computers!
Chalmers

After redoing things (uninstalling V C++ 2010 SP1, Hypersnap 7.26.02 and reinstalling both) I haven't had any problems with Hypersnap no being able to start because it couldn't find mfc100u.dll. I'm using HyperSnap on a system running Windows 7 Pro 64-bit and have installed Windows 8 Pro 64bit on another partition on the same HP notebook HDD. I plan testing it over the next few weeks before making a decision whether or not to also install it on my wife's acer notebook running Windows 7 Home premium 64bit. Not going to try Windows 8.1 until M.S. irons out some of the issues.

I am a long time user of Hypersnap and I also have a problem with the msc100u.dll file being removed.  It currently only happens on my system running XPSP3 32 bit and no other OS.  I copied the file and put .bak extension on the original file.  When it disappears, I copy the back up file back into the folder and remove the ".bak" extension so it has the original file name always keeping the backed up file in the folder.  I use Microsoft Essentials Security and no other.  Not sure why the file keeps being removed.
 
Thanks,
P Meyers
ram5thwheel