File iassdo.dll.mui corrupt

I have a 7ult PC that is working fine, but an SFC scan marks file iassdo.dll.mui as corrupt. There are just a few posts out there about this including mine, but nothing to indicate if this issue is the result of malware or some other cause. The PC has enough daily use that I'd rather not reinstall or repair install without exploring other options. I haven't found any problems with malwarebytes, superantispyware, msse. What can you tell me?

As you know because you have posted in our malware removal forum before...