Windows 7 - ordinal 491 not found

hey, i have been having some blue screens lately and have been system restoring my computer. no blue screen has happened lately but i cannon open a few files because the message pops up "mvt.App.exe -dordinal not found. the ordinal 491 could not be located in the dynamic libraby urlmon.dll" i would do i virus scan with mcafee but that is one of the few programs that do not work.
any help would be appreciate!

MvtApp is an application manager belonging to McAfee. Urlmon.dll is essential for Windows to work correctly.

So I'm not exactly sure what is going on to initially cause this.

If you can, download malwarebytes and run it, searching for malware.

Also, since McAfee is not working, download Microsoft Security Essentials to search for viruses.

Let us know what you find.

i have installed both of those iteams and have done a full computer scan, and it shows nothing wrong. is there something wrong with the file mcafee security itself? i there is, thanks for giving me another source to look for viruses with. I appreciate it!

Normally I don't have problems with McAfee. If you want, you can uninstall McAfee and install Microsoft Security Essentials.

Please refer to:

Removing McAfee Anti Virus