A little info on the file dimisawo.dll, http://www.prevx.com/filenames/36276317011...MISAWO.DLL.html
, a little info on logon.exe, http://www.processlibrary.com/directory/files/logon/
(Ignore all ads & solicitations).
The fact that these files cannot be found on his system...probably means that his system was infected, but something removed the infected files named. But the pointers to run the infected files were left behind.
You can use AutoRuns for Windows - http://technet.microsoft.com/en-us/sysinte...s/bb963902.aspx
to disable/remove the pointers.
Once Autoruns is installed...go to the Logon tab
. This will display the startup items, both from the registry and from files. If you have any doubt about what an item may be...use Google to look up data on it. Disable rather than delete...any item you are unsure of. Do not search any of the other tabs in Autorums.
There is also the possibility that your husband's system is infected...or will beocme infected again. Few, if any, users change their habiits which led to infection.
To counter that, I suggest seeing that SP3 and all subsequent critical updates are installed right away. That includes IE 8 and the critical updates that apply to it.
I would keep Malwarebytes and SUPERAntispyware installed, updated, and used on any system I had control over. Ditto for a reliable free AV program, such as Avira AntiVir, http://www.softpedia.com/progDownload/Anti...nload-6527.html
. Click the Softpedia Secure Download (US) button.
People always ask about the frequency of scans with AV/antimalware programs. My answer to that is...every second of every day, something is trying to either sabotage my systems or obtain information from them...there is no schedule in effect for these idiots, and I don't believe there should be a schedule in effect for those who are trying to prevent such. That's why it's good to have an AV program that scans constantly...and a firewall that is in operation 24/7.
SUPERAntispyware...I run every 5 days or so, Malwarebytes I have installed for reasons of familiarity, not because I routinely find infections on my systems.
Some of the personnel at one of our malware forums can probably give you a better idea of how to protect your systems, take a visit to http://www.bleepingcomputer.com/forums/f/25/antivirus-firewall-and-privacy-products-and-protection-methods/